MML PRECALCULUS ENHANCED
7th Edition
ISBN: 9780134119250
Author: Sullivan
Publisher: INTER PEAR
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Textbook Question
Chapter 9.3, Problem 22SB
In Problems 13-24, plot each
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A ladder 25 feet long is leaning against the wall of a building. Initially, the foot of the ladder is 7 feet from the wall. The foot of the ladder begins to slide at a rate of 2 ft/sec, causing the top of the ladder to slide down the wall. The location of the foot of the ladder, its x coordinate, at time t seconds is given by
x(t)=7+2t.
wall
y(1)
25 ft. ladder
x(1)
ground
(a) Find the formula for the location of the top of the ladder, the y coordinate, as a function of time t. The formula for y(t)= √ 25² - (7+2t)²
(b) The domain of t values for y(t) ranges from 0
(c) Calculate the average velocity of the top of the ladder on each of these time intervals (correct to three decimal places):
. (Put your cursor in the box, click and a palette will come up to help you enter your symbolic answer.)
time interval
ave velocity
[0,2]
-0.766
[6,8]
-3.225
time interval
ave velocity
-1.224
-9.798
[2,4]
[8,9]
(d) Find a time interval [a,9] so that the average velocity of the top of the ladder on this…
Total marks 15
3.
(i)
Let FRN Rm be a mapping and x = RN is a given
point. Which of the following statements are true? Construct counterex-
amples for any that are false.
(a)
If F is continuous at x then F is differentiable at x.
(b)
If F is differentiable at x then F is continuous at x.
If F is differentiable at x then F has all 1st order partial
(c)
derivatives at x.
(d) If all 1st order partial derivatives of F exist and are con-
tinuous on RN then F is differentiable at x.
[5 Marks]
(ii) Let mappings
F= (F1, F2) R³ → R² and
G=(G1, G2) R² → R²
:
be defined by
F₁ (x1, x2, x3) = x1 + x²,
G1(1, 2) = 31,
F2(x1, x2, x3) = x² + x3,
G2(1, 2)=sin(1+ y2).
By using the chain rule, calculate the Jacobian matrix of the mapping
GoF R3 R²,
i.e., JGoF(x1, x2, x3). What is JGOF(0, 0, 0)?
(iii)
[7 Marks]
Give reasons why the mapping Go F is differentiable at
(0, 0, 0) R³ and determine the derivative matrix D(GF)(0, 0, 0).
[3 Marks]
5.
(i)
Let f R2 R be defined by
f(x1, x2) = x² - 4x1x2 + 2x3.
Find all local minima of f on R².
(ii)
[10 Marks]
Give an example of a function f: R2 R which is not bounded
above and has exactly one critical point, which is a minimum. Justify briefly
Total marks 15
your answer.
[5 Marks]
Chapter 9 Solutions
MML PRECALCULUS ENHANCED
Ch. 9.1 - Plot the point whose rectangular coordinates are (...Ch. 9.1 - To complete the square of x 2 +6x , add ______ .Ch. 9.1 - If P=( x,y ) is a point on the terminal side of...Ch. 9.1 - tan 1 ( 1 )= ______ .Ch. 9.1 - Prob. 5CVCh. 9.1 - Prob. 6CVCh. 9.1 - For the point with polar coordinates ( 1, 2 ) ,...Ch. 9.1 - The point ( 5, 6 ) can also be represented by...Ch. 9.1 - True or False In the polar coordinates ( r, ) , r...Ch. 9.1 - True or False The polar coordinates of a point are...
Ch. 9.1 - In Problems 11-18, match each point in polar...Ch. 9.1 - Prob. 12SBCh. 9.1 - Prob. 13SBCh. 9.1 - In Problems 11-18, match each point in polar...Ch. 9.1 - In Problems 11-18, match each point in polar...Ch. 9.1 - In Problems 11-18, match each point in polar...Ch. 9.1 - In Problems 11-18, match each point in polar...Ch. 9.1 - In Problems 11-18, match each point in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 19-32, plot each point given in polar...Ch. 9.1 - In Problems 33-40, plot each point given in polar...Ch. 9.1 - In Problems 33-40, plot each point given in polar...Ch. 9.1 - In Problems 33-40, plot each point given in polar...Ch. 9.1 - In Problems 33-40, plot each point given in polar...Ch. 9.1 - In Problems 33-40, plot each point given in polar...Ch. 9.1 - In Problems 33-40, plot each point given in polar...Ch. 9.1 - In Problems 33-40, plot each point given in polar...Ch. 9.1 - In Problems 33-40, plot each point given in polar...Ch. 9.1 - In Problems 41-56, polar coordinates of a point...Ch. 9.1 - In Problems 41-56, polar coordinates of a point...Ch. 9.1 - In Problems 41-56, polar coordinates of a point...Ch. 9.1 - Prob. 44SBCh. 9.1 - Prob. 45SBCh. 9.1 - Prob. 46SBCh. 9.1 - Prob. 47SBCh. 9.1 - Prob. 48SBCh. 9.1 - Prob. 49SBCh. 9.1 - Prob. 50SBCh. 9.1 - Prob. 51SBCh. 9.1 - In Problems 41-56, polar coordinates of a point...Ch. 9.1 - In Problems 41-56, polar coordinates of a point...Ch. 9.1 - In Problems 41-56, polar coordinates of a point...Ch. 9.1 - In Problems 41-56, polar coordinates of a point...Ch. 9.1 - In Problems 41-56, polar coordinates of a point...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 57-68, the rectangular coordinates of...Ch. 9.1 - In Problems 69-76, the letters xandy represent...Ch. 9.1 - In Problems 69-76, the letters xandy represent...Ch. 9.1 - In Problems 69-76, the letters xandy represent...Ch. 9.1 - In Problems 69-76, the letters xandy represent...Ch. 9.1 - In Problems 69-76, the letters xandy represent...Ch. 9.1 - In Problems 69-76, the letters xandy represent...Ch. 9.1 - In Problems 69-76, the letters xandy represent...Ch. 9.1 - In Problems 69-76, the letters xandy represent...Ch. 9.1 - In Problems 69-76, the letters rand represent...Ch. 9.1 - In Problems 69-76, the letters rand represent...Ch. 9.1 - In Problems 69-76, the letters rand represent...Ch. 9.1 - In Problems 69-76, the letters rand represent...Ch. 9.1 - In Problems 69-76, the letters rand represent...Ch. 9.1 - In Problems 69-76, the letters rand represent...Ch. 9.1 - In Problems 69-76, the letters rand represent...Ch. 9.1 - In Problems 69-76, the letters rand represent...Ch. 9.1 - Chicago ln Chicago, the road system is set up like...Ch. 9.1 - Prob. 86AECh. 9.1 - In converting from polar coordinates to...Ch. 9.1 - Explain how to convert from rectangular...Ch. 9.1 - Is the street system in your town based on a...Ch. 9.1 - Problems 90-93 are based on material learned...Ch. 9.1 - Problems 90-93 are based on material learned...Ch. 9.1 - Problems 90-93 are based on material learned...Ch. 9.1 - Problems 90-93 are based on material learned...Ch. 9.2 - Prob. 1AYPCh. 9.2 - The difference formula for cosine is cos( AB )= ....Ch. 9.2 - Prob. 3AYPCh. 9.2 - Is the sine function even, odd, or neither? (p....Ch. 9.2 - sin 5 4 = . (pp. 385-387)Ch. 9.2 - cos 2 3 = . (pp. 385-387)Ch. 9.2 - An equation whose variables are polar coordinates...Ch. 9.2 - True or False The tests for symmetry in polar...Ch. 9.2 - Prob. 9CVCh. 9.2 - Prob. 10CVCh. 9.2 - True or False A cardioid passes through the pole.Ch. 9.2 - Rose curves are characterized by equations of the...Ch. 9.2 - Prob. 13CVCh. 9.2 - In polar coordinates, the points ( r, )and( r, )...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - In Problems 15-30, transform each polar equation...Ch. 9.2 - Prob. 31SBCh. 9.2 - In problems 31-38, match each of the graphs ( A )...Ch. 9.2 - In problems 31-38, match each of the graphs ( A )...Ch. 9.2 - In problems 31-38, match each of the graphs ( A )...Ch. 9.2 - In problems 31-38, match each of the graphs ( A )...Ch. 9.2 - In problems 31-38, match each of the graphs ( A )...Ch. 9.2 - In problems 31-38, match each of the graphs ( A )...Ch. 9.2 - In problems 31-38, match each of the graphs ( A )...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 39-62, identify and graph each polar...Ch. 9.2 - In Problems 63-68, graph each pair of polar...Ch. 9.2 - In Problems 63-68, graph each pair of polar...Ch. 9.2 - In Problems 63-68, graph each pair of polar...Ch. 9.2 - In Problems 63-68, graph each pair of polar...Ch. 9.2 - In Problems 63-68, graph each pair of polar...Ch. 9.2 - In Problems 63-68, graph each pair of polar...Ch. 9.2 - In problems 69-72, the polar equation for each...Ch. 9.2 - In problems 69-72, the polar equation for each...Ch. 9.2 - In problems 69-72, the polar equation for each...Ch. 9.2 - In problems 69-72, the polar equation for each...Ch. 9.2 - In Problems 73-82, graph each polar equation. r= 2...Ch. 9.2 - Prob. 74AECh. 9.2 - Prob. 75AECh. 9.2 - In Problems 73-82, graph each polar equation. r= 1...Ch. 9.2 - In Problems 73-82, graph each polar equation. r=,0...Ch. 9.2 - In Problems 73-82, graph each polar equation. r= 3...Ch. 9.2 - In Problems 73-82, graph each polar equation....Ch. 9.2 - In Problems 73-82, graph each polar equation....Ch. 9.2 - In Problems 73-82, graph each polar equation....Ch. 9.2 - In Problems 73-82, graph each polar equation....Ch. 9.2 - Show that the graph of the equation rsin=a is a...Ch. 9.2 - Show that the graph of the equation rcos=a is a...Ch. 9.2 - Prob. 85AECh. 9.2 - Prob. 86AECh. 9.2 - Prob. 87AECh. 9.2 - Prob. 88AECh. 9.2 - Explain why the following test for symmetry is...Ch. 9.2 - Explain why the vertical-line test used to...Ch. 9.2 - The tests for symmetry given on page 591 are...Ch. 9.2 - Explain why the vertical-line test used to...Ch. 9.2 - Problems 93-96 are based on material learned...Ch. 9.2 - Problems 93-96 are based on material learned...Ch. 9.2 - Problems 93-96 are based on material learned...Ch. 9.2 - Problems 93-96 are based on material learned...Ch. 9.3 - The conjugate of 43i is _______. (p. A59)Ch. 9.3 - The sum formula for the sine function sin(A+B)=...Ch. 9.3 - The sum formula for the cosine function is...Ch. 9.3 - sin 120 = ; cos 240 = . (pp. 385-387)Ch. 9.3 - In the complex plane, the x-axis is referred to as...Ch. 9.3 - When a complex number z is written in the polar...Ch. 9.3 - Let z 1 =r 1 (cos 1 +isin 1 ) and z 2 =r 2 (cos ...Ch. 9.3 - If z=r( cos+isin ) is a complex number, then z n...Ch. 9.3 - Every nonzero complex number will have exactly...Ch. 9.3 - True or False The polar form of a nonzero complex...Ch. 9.3 - If z=x+yi is a complex number, then | z | equals...Ch. 9.3 - If z 1 = r 1 ( cos 1 +isin 1 ) , and z 2 = r 2 (...Ch. 9.3 - In Problems 13-24, plot each complex number in the...Ch. 9.3 - Prob. 14SBCh. 9.3 - Prob. 15SBCh. 9.3 - Prob. 16SBCh. 9.3 - In Problems 13-24, plot each complex number in the...Ch. 9.3 - Prob. 18SBCh. 9.3 - Prob. 19SBCh. 9.3 - In Problems 13-24, plot each complex number in the...Ch. 9.3 - In Problems 13-24, plot each complex number in the...Ch. 9.3 - In Problems 13-24, plot each complex number in the...Ch. 9.3 - In Problems 13-24, plot each complex number in the...Ch. 9.3 - In Problems 13-24, plot each complex number in the...Ch. 9.3 - In Problems 25-34, write each complex number in...Ch. 9.3 - In Problems 25-34, write each complex number in...Ch. 9.3 - In Problems 25-34, write each complex number in...Ch. 9.3 - In Problems 25-34, write each complex number in...Ch. 9.3 - In Problems 25-34, write each complex number in...Ch. 9.3 - In Problems 25-34, write each complex number in...Ch. 9.3 - Prob. 31SBCh. 9.3 - Prob. 32SBCh. 9.3 - In Problems 25-34, write each complex number in...Ch. 9.3 - In Problems 25-34, write each complex number in...Ch. 9.3 - Prob. 35SBCh. 9.3 - In Problems 35-42, find zw and z w . Leave your...Ch. 9.3 - Prob. 37SBCh. 9.3 - Prob. 38SBCh. 9.3 - In Problems 35-42, find zw and z w . Leave your...Ch. 9.3 - In Problems 35-42, find zw and z w . Leave your...Ch. 9.3 - In Problems 35-42, find zw and z w . Leave your...Ch. 9.3 - In Problems 35-42, find zw and z w . Leave your...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 43-54, write each expression in the...Ch. 9.3 - In Problems 55-60, find all the complex roots....Ch. 9.3 - In Problems 55-60, find all the complex roots....Ch. 9.3 - In Problems 55-60, find all the complex roots....Ch. 9.3 - In Problems 55-60, find all the complex roots....Ch. 9.3 - In Problems 55-60, find all the complex roots....Ch. 9.3 - In Problems 55-60, find all the complex roots....Ch. 9.3 - Solve x 5 i=0 using the methods of this section.Ch. 9.3 - Solve x 5 +i=0 using the methods of this section.Ch. 9.3 - Find the four complex fourth roots of unity (1)...Ch. 9.3 - Find the six complex sixth roots of unity (1) and...Ch. 9.3 - Show that each complex n th root of a nonzero...Ch. 9.3 - Use the result of Problem 65 to draw the...Ch. 9.3 - Refer to Problem 66. Show that the complex n th...Ch. 9.3 - Prove formula (6).Ch. 9.3 - Prove that De Moivres Theorem is true for all...Ch. 9.3 - Mandelbrot Sets (a) Consider the expression a n =...Ch. 9.3 - Prob. 71RYKCh. 9.3 - Problems 71-74 are based on material learned...Ch. 9.3 - Problems 71-74 are based on material learned...Ch. 9.3 - Problems 71-74 are based on material learned...Ch. 9.4 - A ________ is a quantity that has both magnitude...Ch. 9.4 - If v is a vector, then v+( v )= ___.Ch. 9.4 - A vector u for which u =1 is called a(n) _______...Ch. 9.4 - If v= a,b is an algebraic vector whose initial...Ch. 9.4 - Prob. 5CVCh. 9.4 - Prob. 6CVCh. 9.4 - True or False Force is an example of a vector.Ch. 9.4 - True or False Mass is an example of a vector.Ch. 9.4 - If v is a vector with initial point ( x 1 , y 1 )...Ch. 9.4 - Prob. 10CVCh. 9.4 - In Problems 11-18, use the vectors in the figure...Ch. 9.4 - In Problems 11-18, use the vectors in the figure...Ch. 9.4 - In Problems 11-18, use the vectors in the figure...Ch. 9.4 - In Problems 11-18, use the vectors in the figure...Ch. 9.4 - In Problems 11-18, use the vectors in the figure...Ch. 9.4 - In Problems 11-18, use the vectors in the figure...Ch. 9.4 - In Problems 11-18, use the vectors in the figure...Ch. 9.4 - In Problems 11-18, use the vectors in the figure...Ch. 9.4 - In Problems 19-26, use the figure at the right....Ch. 9.4 - In Problems 19-26, use the figure at the right....Ch. 9.4 - In Problems 19-26, use the figure at the right....Ch. 9.4 - In Problems 19-26, use the figure at the right....Ch. 9.4 - In Problems 19-26, use the figure at the right....Ch. 9.4 - In Problems 19-26, use the figure at the right....Ch. 9.4 - In Problems 19-26, use the figure at the right....Ch. 9.4 - In Problems 19-26, use the figure at the right....Ch. 9.4 - Prob. 27SBCh. 9.4 - If v =2 , what is 4v ?Ch. 9.4 - In Problems 29-36, the vector v has initial point...Ch. 9.4 - In Problems 29-36, the vector v has initial point...Ch. 9.4 - In Problems 29-36, the vector v has initial point...Ch. 9.4 - In Problems 29-36, the vector v has initial point...Ch. 9.4 - In Problems 29-36, the vector v has initial point...Ch. 9.4 - In Problems 29-36, the vector v has initial point...Ch. 9.4 - In Problems 29-36, the vector v has initial point...Ch. 9.4 - In Problems 29-36, the vector v has initial point...Ch. 9.4 - In Problems 37-42, find v . v=3i4jCh. 9.4 - In Problems 37-42, find v . v=5i+12jCh. 9.4 - In Problems 37-42, find v . v=ijCh. 9.4 - In Problems 37-42, find v . v=ijCh. 9.4 - In Problems 37-42, find v . v=2i+3jCh. 9.4 - In Problems 37-42, find v . v=6i+2jCh. 9.4 - In Problems 43-48, find each quantity if...Ch. 9.4 - In Problems 43-48, find each quantity if...Ch. 9.4 - In Problems 43-48, find each quantity if...Ch. 9.4 - In Problems 43-48, find each quantity if...Ch. 9.4 - In Problems 43-48, find each quantity if...Ch. 9.4 - In Problems 43-48, find each quantity if...Ch. 9.4 - Prob. 49SBCh. 9.4 - In Problems 49-54, find the unit vector in the...Ch. 9.4 - Prob. 51SBCh. 9.4 - Prob. 52SBCh. 9.4 - In Problems 49-54, find the unit vector in the...Ch. 9.4 - In Problems 49-54, find the unit vector in the...Ch. 9.4 - Prob. 55SBCh. 9.4 - Prob. 56SBCh. 9.4 - If v=2ijandw=xi+3j , find all numbers x for which ...Ch. 9.4 - If P=( 3,1 )andQ=( x,4 ) , find all numbers x...Ch. 9.4 - Prob. 59SBCh. 9.4 - Prob. 60SBCh. 9.4 - Prob. 61SBCh. 9.4 - Prob. 62SBCh. 9.4 - Prob. 63SBCh. 9.4 - Prob. 64SBCh. 9.4 - Prob. 65SBCh. 9.4 - Prob. 66SBCh. 9.4 - Prob. 67SBCh. 9.4 - Prob. 68SBCh. 9.4 - Prob. 69SBCh. 9.4 - Prob. 70SBCh. 9.4 - Prob. 71SBCh. 9.4 - Prob. 72SBCh. 9.4 - Prob. 73AECh. 9.4 - Force Vectors A man pushes a wheelbarrow up an...Ch. 9.4 - Prob. 75AECh. 9.4 - Prob. 76AECh. 9.4 - Finding the Actual Speed and Direction of an...Ch. 9.4 - Finding the Actual Speed and Direction of an...Ch. 9.4 - Prob. 79AECh. 9.4 - Prob. 80AECh. 9.4 - Prob. 81AECh. 9.4 - Weight of a Car A magnitude of 1200 pounds of...Ch. 9.4 - Correct Direction for Crossing a River A river has...Ch. 9.4 - Finding the Correct Compass Heading The pilot of...Ch. 9.4 - Charting a Course A helicopter pilot needs to...Ch. 9.4 - Crossing a River A captain needs to pilot a boat...Ch. 9.4 - Static Equilibrium A weight of 1000 pounds is...Ch. 9.4 - Static Equilibrium A weight of 800 pounds is...Ch. 9.4 - Static Equilibrium A tightrope walker located at a...Ch. 9.4 - Static Equilibrium Repeat Problem 89 if the angle...Ch. 9.4 - Static Friction A 20-pound box sits at rest on a...Ch. 9.4 - Inclined Ramp A 2-pound weight is attached to a...Ch. 9.4 - Inclined Ramp A box sitting on a horizontal...Ch. 9.4 - Prob. 94AECh. 9.4 - Truck Pull At a county fair truck pull, two pickup...Ch. 9.4 - Removing a Slump A farmer wishes to remove a stump...Ch. 9.4 - Prob. 97AECh. 9.4 - Computer Graphics Refer to Problem 97. The points...Ch. 9.4 - Static Equilibrium Show on the following graph the...Ch. 9.4 - Explain in your own words what a vector is. Give...Ch. 9.4 - Write a brief paragraph comparing the algebra of...Ch. 9.4 - Explain the difference between an algebraic vector...Ch. 9.4 - Problems 103-106 are based on material learned...Ch. 9.4 - Problems 103-106 are based on material learned...Ch. 9.4 - Problems 103-106 are based on material learned...Ch. 9.4 - Problems 103-106 are based on material learned...Ch. 9.5 - In a triangle with sides a, b, c and angles A, B,...Ch. 9.5 - If w= a 2 i+ b 2 j and v= a 1 i+ b 1 j are two...Ch. 9.5 - If vw=0 , then the two vectors v and w are ______.Ch. 9.5 - If v=3w , then the two vectors v and w are _____.Ch. 9.5 - True or False Given two nonzero vectors v and w,...Ch. 9.5 - True or False Work is a physical example of a...Ch. 9.5 - Prob. 7CVCh. 9.5 - Prob. 8CVCh. 9.5 - Prob. 9SBCh. 9.5 - Prob. 10SBCh. 9.5 - Prob. 11SBCh. 9.5 - Prob. 12SBCh. 9.5 - Prob. 13SBCh. 9.5 - Prob. 14SBCh. 9.5 - Prob. 15SBCh. 9.5 - Prob. 16SBCh. 9.5 - Prob. 17SBCh. 9.5 - Prob. 18SBCh. 9.5 - Kind a SO that the vectors v=iajandw=2i+3j are...Ch. 9.5 - Find b so that the vectors v=i+jandw=i+bj are...Ch. 9.5 - In Problems 21-26, decompose v into two vectors v...Ch. 9.5 - In Problems 21-26, decompose v into two vectors v...Ch. 9.5 - In Problems 21-26, decompose v into two vectors v...Ch. 9.5 - In Problems 21-26, decompose v into two vectors v...Ch. 9.5 - In Problems 21-26, decompose v into two vectors v...Ch. 9.5 - In Problems 21-26, decompose v into two vectors v...Ch. 9.5 - Given vectors u=i+5jandv=4i+yj , angle between the...Ch. 9.5 - Prob. 28AECh. 9.5 - Prob. 29AECh. 9.5 - Computing Work A wagon is pulled horizontally by...Ch. 9.5 - Solar Energy The amount of energy collected by a...Ch. 9.5 - Prob. 32AECh. 9.5 - Prob. 33AECh. 9.5 - Prob. 34AECh. 9.5 - Prob. 35AECh. 9.5 - Incline Angle A bulldozer exerts 1000 pounds of...Ch. 9.5 - Prob. 37AECh. 9.5 - Prove the distributive property: u( v+w )=uv+uwCh. 9.5 - Prove property ( 5 ):0v=0 .Ch. 9.5 - If v is a unit vector and the angle between v and...Ch. 9.5 - Prob. 41AECh. 9.5 - Show that the projection of v onto i is ( vi ) i ....Ch. 9.5 - (a) If u and v have the same magnitude, show that...Ch. 9.5 - Let v and w denote two nonzero vectors. Show that...Ch. 9.5 - Let v and w denote two nonzero vectors. Show that...Ch. 9.5 - In the definition of work given in this section,...Ch. 9.5 - Prove the polarization identify, u+v 2 u-v 2...Ch. 9.5 - Prob. 48DWCh. 9.5 - Problems 49-52 are based on material learned...Ch. 9.5 - Problems 49-52 are based on material learned...Ch. 9.5 - Problems 49-52 are based on material learned...Ch. 9.5 - Problems 49-52 are based on material learned...Ch. 9.6 - The distance d from P 1 =( x 1 , y 1 ) to P 1 =( x...Ch. 9.6 - In space, points of the form ( x,y,0 ) lie in a...Ch. 9.6 - If v=ai+bj+ck is a vector in space, the scalars a...Ch. 9.6 - The squares of the direction cosines of a vector...Ch. 9.6 - True or False In space, the dot product of two...Ch. 9.6 - Prob. 6CVCh. 9.6 - In Problems 7-14, describe the set of points (...Ch. 9.6 - In Problems 7-14, describe the set of points (...Ch. 9.6 - In Problems 7-14, describe the set of points (...Ch. 9.6 - In Problems 7-14, describe the set of points (...Ch. 9.6 - In Problems 7-14, describe the set of points (...Ch. 9.6 - In Problems 7-14, describe the set of points (...Ch. 9.6 - In Problems 7-14, describe the set of points (...Ch. 9.6 - In Problems 7-14, describe the set of points (...Ch. 9.6 - In Problems 15-20, find the distance from P 1 to P...Ch. 9.6 - In Problems 15-20, find the distance from P 1 to P...Ch. 9.6 - In Problems 15-20, find the distance from P 1 to P...Ch. 9.6 - In Problems 15-20, find the distance from P 1 to P...Ch. 9.6 - In Problems 15-20, find the distance from P 1 to P...Ch. 9.6 - In Problems 15-20, find the distance from P 1 to P...Ch. 9.6 - In Problems 21-26, opposite vertices of a...Ch. 9.6 - In Problems 21-26, opposite vertices of a...Ch. 9.6 - In Problems 21-26, opposite vertices of a...Ch. 9.6 - In Problems 21-26, opposite vertices of a...Ch. 9.6 - In Problems 21-26, opposite vertices of a...Ch. 9.6 - In Problems 21-26, opposite vertices of a...Ch. 9.6 - In Problems 27-32, the vector v has initial point...Ch. 9.6 - In Problems 27-32, the vector v s has initial...Ch. 9.6 - In Problems 27-32, the vector v has initial point...Ch. 9.6 - In Problems 27-32, the vector v has initial point...Ch. 9.6 - In Problems 27-32, the vector v has initial point...Ch. 9.6 - In Problems 27-32, the vector v has initial point...Ch. 9.6 - In Problems 33-38, find v . v=3i6j2kCh. 9.6 - In Problems 33-38, find v . v=6i+12j+4kCh. 9.6 - In Problems 33-38, find v . v=ij+kCh. 9.6 - In Problems 33-38, find v . v=ij+kCh. 9.6 - In Problems 33-38, find v . v=2i+3j3kCh. 9.6 - In Problems 33-38, find v . v=6i+2j2kCh. 9.6 - In Problems 39-44, find each quantity if v=3i5j+2k...Ch. 9.6 - In Problems 39-44, find each quantity if v=3i5j+2k...Ch. 9.6 - In Problems 39-44, find each quantity if v=3i5j+2k...Ch. 9.6 - In Problems 39-44, find each quantity if v=3i5j+2k...Ch. 9.6 - In Problems 39-44, find each quantity if v=3i5j+2k...Ch. 9.6 - In Problems 39-44, find each quantity if v=3i5j+2k...Ch. 9.6 - Prob. 45SBCh. 9.6 - In Problems 45-50, find the unit vector in the...Ch. 9.6 - In Problems 45-50, find the unit vector in the...Ch. 9.6 - In Problems 45-50, find the unit vector in the...Ch. 9.6 - In Problems 45-50, find the unit vector in the...Ch. 9.6 - In Problems 45-50, find the unit vector in the...Ch. 9.6 - Prob. 51SBCh. 9.6 - Prob. 52SBCh. 9.6 - Prob. 53SBCh. 9.6 - Prob. 54SBCh. 9.6 - Prob. 55SBCh. 9.6 - Prob. 56SBCh. 9.6 - Prob. 57SBCh. 9.6 - Prob. 58SBCh. 9.6 - Prob. 59SBCh. 9.6 - Prob. 60SBCh. 9.6 - In Problems 59-66, find the direction angles of...Ch. 9.6 - In Problems 59-66, find the direction angles of...Ch. 9.6 - In Problems 59-66, find the direction angles of...Ch. 9.6 - In Problems 59-66, find the direction angles of...Ch. 9.6 - Prob. 65SBCh. 9.6 - Prob. 66SBCh. 9.6 - Prob. 67SBCh. 9.6 - The Sphere In space, the collection of all points...Ch. 9.6 - In Problems 69 and 70, find an equation of a...Ch. 9.6 - In Problems 69 and 70, find an equation of a...Ch. 9.6 - In Problems 71-76, find the radius and center of...Ch. 9.6 - In Problems 71-76, find the radius and center of...Ch. 9.6 - In Problems 71-76, find the radius and center of...Ch. 9.6 - In Problems 71-76, find the radius and center of...Ch. 9.6 - In Problems 71-76, find the radius and center of...Ch. 9.6 - In Problems 71-76, find the radius and center of...Ch. 9.6 - Work Find the work done by a force of 3 newtons...Ch. 9.6 - Work Find the work done by a force of 1 newton...Ch. 9.6 - Prob. 79SBCh. 9.6 - solve: 3 x2 5Ch. 9.6 - Given f( x )=2x3 and g( x )= x 2 +x1 , find ( fg...Ch. 9.6 - Find the exact value of sin 80 cos 50 cos 80 ...Ch. 9.6 - Solve the triangle.Ch. 9.7 - Prob. 1CVCh. 9.7 - True or False For any vector v,vv=0 .Ch. 9.7 - Prob. 3CVCh. 9.7 - True or False uv is a vector that is parallel to...Ch. 9.7 - Prob. 5CVCh. 9.7 - True or False The area of the parallelogram having...Ch. 9.7 - In Problems 7-14, find the value of each...Ch. 9.7 - In Problems 7-14, find the value of each...Ch. 9.7 - In Problems 7-14, find the value of each...Ch. 9.7 - In Problems 7-14, find the value of each...Ch. 9.7 - In Problems 7-14, find the value of each...Ch. 9.7 - In Problems 7-14, find the value of each...Ch. 9.7 - In Problems 7-14, find the value of each...Ch. 9.7 - In Problems 7-14, find the value of each...Ch. 9.7 - In Problems 15-22, find (a) vw , (b) wv , (c) ww ,...Ch. 9.7 - In Problems 15-22, find (a) vw , (b) wv , (c) ww ,...Ch. 9.7 - In Problems 15-22, find (a) vw , (b) wv , (c) ww ,...Ch. 9.7 - In Problems 15-22, find (a) vw , (b) wv , (c) ww ,...Ch. 9.7 - In Problems 15-22, find (a) vw , (b) wv , (c) ww ,...Ch. 9.7 - In Problems 15-22, find (a) vw , (b) wv , (c) ww ,...Ch. 9.7 - Prob. 21SBCh. 9.7 - Prob. 22SBCh. 9.7 - Prob. 23SBCh. 9.7 - Prob. 24SBCh. 9.7 - Prob. 25SBCh. 9.7 - Prob. 26SBCh. 9.7 - Prob. 27SBCh. 9.7 - Prob. 28SBCh. 9.7 - Prob. 29SBCh. 9.7 - Prob. 30SBCh. 9.7 - Prob. 31SBCh. 9.7 - Prob. 32SBCh. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 23-44, use the given vectors u,v,andw...Ch. 9.7 - In Problems 45-48, find the area of the...Ch. 9.7 - In Problems 45-48, find the area of the...Ch. 9.7 - In Problems 45-48, find the area of the...Ch. 9.7 - In Problems 45-48, find the area of the...Ch. 9.7 - In Problems 49-52, find the area of the...Ch. 9.7 - Prob. 50SBCh. 9.7 - In Problems 49-52, find the area of the...Ch. 9.7 - In Problems 49-52, find the area of the...Ch. 9.7 - Prob. 53AECh. 9.7 - Prob. 54AECh. 9.7 - Prob. 55AECh. 9.7 - Prob. 56AECh. 9.7 - Prove for vectors uandv that uv 2 = u 2 v 2 ...Ch. 9.7 - Prob. 58AECh. 9.7 - Show that if uandv are orthogonal unit vectors,...Ch. 9.7 - Prove property (3).Ch. 9.7 - Prove property (5).Ch. 9.7 - Prove property (9). [Hint: Use the result of...Ch. 9.7 - Prob. 63DWCh. 9.7 - Find the exact value of cos 1 ( 1 2 ) .Ch. 9.7 - Find two pairs of polar coordinates ( r, ) , one...Ch. 9.7 - Prob. 66RYKCh. 9.7 - Use properties of logarithms to write log 4 x z 3...
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- Total marks 15 4. : Let f R2 R be defined by f(x1, x2) = 2x²- 8x1x2+4x+2. Find all local minima of f on R². [10 Marks] (ii) Give an example of a function f R2 R which is neither bounded below nor bounded above, and has no critical point. Justify briefly your answer. [5 Marks]arrow_forward4. Let F RNR be a mapping. (i) x ЄRN ? (ii) : What does it mean to say that F is differentiable at a point [1 Mark] In Theorem 5.4 in the Lecture Notes we proved that if F is differentiable at a point x E RN then F is continuous at x. Proof. Let (n) CRN be a sequence such that xn → x ЄERN as n → ∞. We want to show that F(xn) F(x), which means F is continuous at x. Denote hnxn - x, so that ||hn|| 0. Thus we find ||F(xn) − F(x)|| = ||F(x + hn) − F(x)|| * ||DF (x)hn + R(hn) || (**) ||DF(x)hn||+||R(hn)||| → 0, because the linear mapping DF(x) is continuous and for all large nЄ N, (***) ||R(hn) || ||R(hn) || ≤ → 0. ||hn|| (a) Explain in details why ||hn|| → 0. [3 Marks] (b) Explain the steps labelled (*), (**), (***). [6 Marks]arrow_forward4. In Theorem 5.4 in the Lecture Notes we proved that if F: RN → Rm is differentiable at x = RN then F is continuous at x. Proof. Let (xn) CRN be a sequence such that x → x Є RN as n → ∞. We want F(x), which means F is continuous at x. to show that F(xn) Denote hn xnx, so that ||hn||| 0. Thus we find ||F (xn) − F(x) || (*) ||F(x + hn) − F(x)|| = ||DF(x)hn + R(hn)|| (**) ||DF(x)hn|| + ||R(hn) || → 0, because the linear mapping DF(x) is continuous and for all large n = N, |||R(hn) || ≤ (***) ||R(hn)|| ||hn|| → 0. Explain the steps labelled (*), (**), (***) [6 Marks] (ii) Give an example of a function F: RR such that F is contin- Total marks 10 uous at x=0 but F is not differentiable at at x = 0. [4 Marks]arrow_forward
- 3. Let f R2 R be a function. (i) Explain in your own words the relationship between the existence of all partial derivatives of f and differentiability of f at a point x = R². (ii) Consider R2 → R defined by : [5 Marks] f(x1, x2) = |2x1x2|1/2 Show that af af -(0,0) = 0 and -(0, 0) = 0, Jx1 მx2 but f is not differentiable at (0,0). [10 Marks]arrow_forward(1) Write the following quadratic equation in terms of the vertex coordinates.arrow_forwardThe final answer is 8/π(sinx) + 8/3π(sin 3x)+ 8/5π(sin5x)....arrow_forward
- Keity x२ 1. (i) Identify which of the following subsets of R2 are open and which are not. (a) A = (2,4) x (1, 2), (b) B = (2,4) x {1,2}, (c) C = (2,4) x R. Provide a sketch and a brief explanation to each of your answers. [6 Marks] (ii) Give an example of a bounded set in R2 which is not open. [2 Marks] (iii) Give an example of an open set in R2 which is not bounded. [2 Marksarrow_forward2. (i) Which of the following statements are true? Construct coun- terexamples for those that are false. (a) sequence. Every bounded sequence (x(n)) nEN C RN has a convergent sub- (b) (c) (d) Every sequence (x(n)) nEN C RN has a convergent subsequence. Every convergent sequence (x(n)) nEN C RN is bounded. Every bounded sequence (x(n)) EN CRN converges. nЄN (e) If a sequence (xn)nEN C RN has a convergent subsequence, then (xn)nEN is convergent. [10 Marks] (ii) Give an example of a sequence (x(n))nEN CR2 which is located on the parabola x2 = x², contains infinitely many different points and converges to the limit x = (2,4). [5 Marks]arrow_forward2. (i) What does it mean to say that a sequence (x(n)) nEN CR2 converges to the limit x E R²? [1 Mark] (ii) Prove that if a set ECR2 is closed then every convergent sequence (x(n))nen in E has its limit in E, that is (x(n)) CE and x() x x = E. [5 Marks] (iii) which is located on the parabola x2 = = x x4, contains a subsequence that Give an example of an unbounded sequence (r(n)) nEN CR2 (2, 16) and such that x(i) converges to the limit x = (2, 16) and such that x(i) # x() for any i j. [4 Marksarrow_forward
- 1. (i) which are not. Identify which of the following subsets of R2 are open and (a) A = (1, 3) x (1,2) (b) B = (1,3) x {1,2} (c) C = AUB (ii) Provide a sketch and a brief explanation to each of your answers. [6 Marks] Give an example of a bounded set in R2 which is not open. (iii) [2 Marks] Give an example of an open set in R2 which is not bounded. [2 Marks]arrow_forward2. if limit. Recall that a sequence (x(n)) CR2 converges to the limit x = R² lim ||x(n)x|| = 0. 818 - (i) Prove that a convergent sequence (x(n)) has at most one [4 Marks] (ii) Give an example of a bounded sequence (x(n)) CR2 that has no limit and has accumulation points (1, 0) and (0, 1) [3 Marks] (iii) Give an example of a sequence (x(n))neN CR2 which is located on the hyperbola x2 1/x1, contains infinitely many different Total marks 10 points and converges to the limit x = (2, 1/2). [3 Marks]arrow_forward3. (i) Consider a mapping F: RN Rm. Explain in your own words the relationship between the existence of all partial derivatives of F and dif- ferentiability of F at a point x = RN. (ii) [3 Marks] Calculate the gradient of the following function f: R2 → R, f(x) = ||x||3, Total marks 10 where ||x|| = √√√x² + x/2. [7 Marks]arrow_forward
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