Calculus Volume 3
16th Edition
ISBN: 9781938168079
Author: Gilbert Strang, Edwin Jed Herman
Publisher: OpenStax
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Textbook Question
Chapter 3, Problem 206RE
Find the domains of the
206.
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The spread of an infectious disease is often modeled using the following autonomous differential equation:
dI
-
- BI(N − I) − MI,
dt
where I is the number of infected people, N is the total size of the population being modeled, ẞ is a constant determining the rate of
transmission, and μ is the rate at which people recover from infection.
Close
a) (5 points) Suppose ẞ = 0.01, N = 1000, and µ = 2. Find all equilibria.
b) (5 points) For the equilbria in part a), determine whether each is stable or unstable.
c) (3 points) Suppose ƒ(I) = d. Draw a phase plot of f against I. (You can use Wolfram Alpha or Desmos to plot the function, or draw the
dt
function by hand.) Identify the equilibria as stable or unstable in the graph.
d) (2 points) Explain the biological meaning of these equilibria being stable or unstable.
Find the indefinite integral.
Check
Answer:
7x
4 + 1x
dx
Chapter 3 Solutions
Calculus Volume 3
Ch. 3.1 - Give the component functions x=f(t) and y=g(t) for...Ch. 3.1 - Given r(t)=3secti+2tantj , find the following...Ch. 3.1 - Sketch the curve of the vector-valued function...Ch. 3.1 - Evaluate limt0eti+sinttj+etk .Ch. 3.1 - Given the vector-valued function r(t)=cost,sint ,...Ch. 3.1 - Given the vector-valued function r(t)=t,t2+1 ,...Ch. 3.1 - Let r(t)=eti+sintj+lntk . Find the following...Ch. 3.1 - Find the limit of the following vector-valued...Ch. 3.1 - Find the limit of the following vector-valued...Ch. 3.1 - Find the limit of the following vector-valued...
Ch. 3.1 - Find the limit of the following vector-valued...Ch. 3.1 - Find the limit of the following vector-valued...Ch. 3.1 - Find the limit of the following vector-valued...Ch. 3.1 - Find the limit of the following vector-valued...Ch. 3.1 - Find the domain of the vector-valued functions....Ch. 3.1 - Find the domain of the vector-valued functions....Ch. 3.1 - Find the domain of the vector-valued functions....Ch. 3.1 - Let r(t)=cost,t,sint and use it to answer the...Ch. 3.1 - Let r(t)=cost,t,sint and use it to answer the...Ch. 3.1 - Let r(t)=cost,t,sint and use it to answer the...Ch. 3.1 - Let r(t)=cost,t,sint and use it to answer the...Ch. 3.1 - Eliminate the parameter t, write the equation in...Ch. 3.1 - Eliminate the parameter t, write the equation in...Ch. 3.1 - Eliminate the parameter t, write the equation in...Ch. 3.1 - Eliminate the parameter t, write the equation in...Ch. 3.1 - Eliminate the parameter t, write the equation in...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - Use a graphing utility to sketch each of the...Ch. 3.1 - [T] Let r(t)=costi+sintj+0.3sin(2t)k . Use...Ch. 3.1 - [T] Use the result of the preceding problem to...Ch. 3.1 - Use the results If the preceding two problems to...Ch. 3.1 - a. Graph the curve...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - Compute the derivatives of the vector-valued...Ch. 3.2 - For the following problems, find a tangent vector...Ch. 3.2 - For the following problems, find a tangent vector...Ch. 3.2 - For the following problems, find a tangent vector...Ch. 3.2 - For the following problems, find a tangent vector...Ch. 3.2 - Find the unit tangent vector for the following...Ch. 3.2 - Find the unit tangent vector for the following...Ch. 3.2 - Find the unit tangent vector for the following...Ch. 3.2 - Find the unit tangent vector for the following...Ch. 3.2 - Find the following. 59. ddt[r(t2)]Ch. 3.2 - Find the following. 60. ddt[t2.s(t)]Ch. 3.2 - Find the following. 61. ddt[r(t).s(t)]Ch. 3.2 - Compute the first, second, and third derivatives...Ch. 3.2 - Find r(t)r(t) for r(t)=3t5i+5tj+2t2k .Ch. 3.2 - The acceleration function, initial velocity, and...Ch. 3.2 - The position vector of a particle is...Ch. 3.2 - Find the velocity and the speed of a panicle with...Ch. 3.2 - Find the velocity function and show that v(t) is...Ch. 3.2 - Show that the speed of the particle is...Ch. 3.2 - Evaluate ddt[u(t)u(t)] given u(t)=t2i2tj+k .Ch. 3.2 - Find the antiderivative of...Ch. 3.2 - Evaluate 03ti+t2jdt .Ch. 3.2 - An object starts from nest at point P(1,2,0) and...Ch. 3.2 - Show that if the speed 0f a particle traveling...Ch. 3.2 - Given r(t)=ti+3tj+t2k and u(t)=4ti+t2j+t3k , find...Ch. 3.2 - Given r(t)=t+cost,tsint , find the velocity and...Ch. 3.2 - Find the velocity vector for the function...Ch. 3.2 - Find the equation of the tangent line to the curve...Ch. 3.2 - Describe and sketch the curve represented by the...Ch. 3.2 - Locate the highest point on the curve r(t)=6t,6tt2...Ch. 3.2 - The position vector for a particle is...Ch. 3.2 - The position vector for a particle is...Ch. 3.2 - The position vector for a particle is...Ch. 3.2 - A particle travels along the path of a helix with...Ch. 3.2 - A particle travels along the path of a helix with...Ch. 3.2 - A particle travels along the path of a helix with...Ch. 3.2 - A particle travels along the path of a helix with...Ch. 3.2 - A particle travels along the path of an ellipse...Ch. 3.2 - A particle travels along the path of an ellipse...Ch. 3.2 - A particle travels along the path of an ellipse...Ch. 3.2 - Given the vector-valued function r(t)=tant,sect,0...Ch. 3.2 - Given the vector-valued function r(t)=tant,sect,0...Ch. 3.2 - Given the vector-valued function r(t)=tant,sect,0...Ch. 3.2 - Find the minimum speed of a particle traveling...Ch. 3.2 - Given r(t)=ti+2sintj+2costk and...Ch. 3.2 - Given r(t)=ti+2sintj+2costk and...Ch. 3.2 - Now, use the product rule for the derivative of...Ch. 3.2 - Find the unit tangent vector T(t) for the...Ch. 3.2 - Find the unit tangent vector T(t) for the...Ch. 3.2 - Find the unit tangent vector T(t) for the...Ch. 3.2 - Evaluate the following integrals: 100. ( e...Ch. 3.2 - Evaluate the following integrals: 101. 01r(t)dt ,...Ch. 3.3 - Find the arc length of the curve on the given...Ch. 3.3 - Find the arc length of the curve on the given...Ch. 3.3 - Find the arc length of the curve on the given...Ch. 3.3 - Find the arc length of the curve on the given...Ch. 3.3 - r(t)=etcost,etsint over the interval [0,2] . Here...Ch. 3.3 - Find the length of one turn of the helix given by...Ch. 3.3 - Find the arc length of the vector-valued function...Ch. 3.3 - A particle travels in a circle with the equation...Ch. 3.3 - Set up an integral to find the circumference of...Ch. 3.3 - Find the length of the curve r(t)=2t,et,et over...Ch. 3.3 - Find the length of the curve r(t)=2sint,5t,2cost...Ch. 3.3 - The position function for a particle is...Ch. 3.3 - Given r(t)=acos(t)i+bsin(t)j , find the binormal...Ch. 3.3 - Given r(t)=2et,etcost,etsint , determine the...Ch. 3.3 - Given r(t)=2et,etcost,etsint , determine the unit...Ch. 3.3 - Given r(t)=2et,etcost,etsint , find the unit...Ch. 3.3 - Given r(t)=2et,etcost,etsint , find the unit...Ch. 3.3 - Given r(t)=ti+t2j+tk . find the unit tangent...Ch. 3.3 - Find the unit tangent vector T(t) and unit normal...Ch. 3.3 - Find the unit tangent vector T(t) for...Ch. 3.3 - Find the principal normal vector to the curve...Ch. 3.3 - Find T(t) for the curve r(t)=(t34t)i+(5t22)j .Ch. 3.3 - Find N(t) for the curve r(t)=(t34t)i+(5t22)j .Ch. 3.3 - Find the unit normal vector N(t) for...Ch. 3.3 - Find the unit tangent vector T(t) for...Ch. 3.3 - Find the arc length function s(t) for the line...Ch. 3.3 - Parameterize the helix r(t)=costi+sintj+tk using...Ch. 3.3 - Parameterize the curve using the arc-length...Ch. 3.3 - Find the curvature of the curve r(t)=5costi+4sintj...Ch. 3.3 - Find the x-coordinate at which the curvature of...Ch. 3.3 - Find the curvature of the curve r(t)=5costi+5sintj...Ch. 3.3 - Find the curvature k for the curve y=x14x2 at the...Ch. 3.3 - Find the curvature k for the curve y=13x3 at the...Ch. 3.3 - Find the curvature k of the curve r(t)=ti+6t2j+4tk...Ch. 3.3 - Find the mature of r(t)=2sint,5t,2cost .Ch. 3.3 - Find the curvature of r(t)=2ti+etj+etk at point...Ch. 3.3 - At what point does the curve y=ex have maximum...Ch. 3.3 - What happens to the curvature as x on for the...Ch. 3.3 - Find the point of maximum curvature on the curve...Ch. 3.3 - Find the equations of the normal plane and the...Ch. 3.3 - Find equations of the osculating circles of the...Ch. 3.3 - Find the equation for the osculating plane at...Ch. 3.3 - Find the radius of curvature of 6y=x3 at the point...Ch. 3.3 - Find the curvature at each point (x,y) on the...Ch. 3.3 - Calculate the mature of the circular helix...Ch. 3.3 - Find the radius of curvature of y=ln(x+1) at point...Ch. 3.3 - Find the radius of curvature of the hyperbola xy=1...Ch. 3.3 - A particle moves along the plane curve C described...Ch. 3.3 - A particle moves along the plane curve C described...Ch. 3.3 - A particle moves along the plane curve C described...Ch. 3.3 - The surface of a large cup is formed by revolving...Ch. 3.3 - The surface of a large cup is formed by revolving...Ch. 3.3 - The surface of a large cup is formed by revolving...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - How fast can a racecar travel through a circular...Ch. 3.4 - Given r(t)=(3t22)i+(2tsin(t))j , find the velocity...Ch. 3.4 - Given r(t)=(3t22)i+(2tsin(t))j , find the...Ch. 3.4 - Given the following position functions, find the...Ch. 3.4 - Given the following position functions, find the...Ch. 3.4 - Given the following position functions, find the...Ch. 3.4 - Find the velocity, acceleration, and speed of a...Ch. 3.4 - Find the velocity, acceleration, and speed of a...Ch. 3.4 - Find the velocity, acceleration, and speed of a...Ch. 3.4 - The position function of an object is given by...Ch. 3.4 - Let r(t)=rcosh(t)i+rsinh(wt)j . Find the velocity...Ch. 3.4 - Consider the motion of a point on the...Ch. 3.4 - A person on a hang glider is spiraling upward as a...Ch. 3.4 - A person on a hang glider is spiraling upward as a...Ch. 3.4 - A person on a hang glider is spiraling upward as a...Ch. 3.4 - Given that r(t)=e5tsint,e5tcost,4e5t is the...Ch. 3.4 - Given that r(t)=e5tsint,e5tcost,4e5t is the...Ch. 3.4 - Given that r(t)=e5tsint,e5tcost,4e5t is the...Ch. 3.4 - Given that r(t)=e5tsint,e5tcost,4e5t is the...Ch. 3.4 - A projectile is shot in the air from ground level...Ch. 3.4 - A projectile is shot in the air from ground level...Ch. 3.4 - A projectile is shot in the air from ground level...Ch. 3.4 - A projectile is shot in the air from ground level...Ch. 3.4 - A projectile is shot in the air from ground level...Ch. 3.4 - A projectile is fired at a height of 1.5m above...Ch. 3.4 - A projectile is fired at a height of 1.5m above...Ch. 3.4 - A projectile is fired at a height of 1.5m above...Ch. 3.4 - A projectile is fired at a height of 1.5m above...Ch. 3.4 - A projectile is fired at a height of 1.5m above...Ch. 3.4 - A projectile is fired at a height of 1.5m above...Ch. 3.4 - A projectile is fired at a height of 1.5m above...Ch. 3.4 - A projectile is fired at a height of 1.5m above...Ch. 3.4 - A projectile is fired at a height of 1.5m above...Ch. 3.4 - For each of the following problems, find the...Ch. 3.4 - For each of the following problems, find the...Ch. 3.4 - For each of the following problems, find the...Ch. 3.4 - For each of the following problems, find the...Ch. 3.4 - For each of the following problems, find the...Ch. 3.4 - For each of the following problems, find the...Ch. 3.4 - For each of the following problems, find the...Ch. 3.4 - For each of the following problems, find the...Ch. 3.4 - For each of the following problems, find the...Ch. 3.4 - All automobile that weighs 2700lb makes a turn on...Ch. 3.4 - Using Kepler’s laws, it can be shown that v0=2GMr0...Ch. 3.4 - Find the lime in years it takes the dwarf planet...Ch. 3.4 - Suppose that the position function for an object...Ch. 3.4 - Suppose that the position function for an object...Ch. 3.4 - Suppose that the position function for an object...Ch. 3 - True or False? Justify your answer with a proof or...Ch. 3 - True or False? Justify your answer with a proof or...Ch. 3 - True or False? Justify your answer with a proof or...Ch. 3 - True or False? Justify your answer with a proof or...Ch. 3 - Find the domains of the vector-valued functions....Ch. 3 - Find the domains of the vector-valued functions....Ch. 3 - Sketch the tunes. for the following vector...Ch. 3 - Sketch the tunes. for the following vector...Ch. 3 - Find a vector function that describes the...Ch. 3 - Find a vector function that describes the...Ch. 3 - Find the derivatives of u(t),u(t),u(t)u(t) ,...Ch. 3 - Find the derivatives of u(t),u(t),u(t)u(t) ,...Ch. 3 - Evaluate the following integrals. 214. (tan(...Ch. 3 - Evaluate the following integrals. 215. 14(t)dt ,...Ch. 3 - Find the length for the following curves. 216....Ch. 3 - Find the length for the following curves. 217....Ch. 3 - Reparametrize the following functions with respect...Ch. 3 - Reparametrize the following functions with respect...Ch. 3 - Find the curvature for the following vector...Ch. 3 - Find the curvature for the following vector...Ch. 3 - Find the curvature for the following vector...Ch. 3 - Find the curvature for the following vector...Ch. 3 - Find the curvature for the following vector...Ch. 3 - Find the curvature for the following vector...Ch. 3 - The following problems consider launching a...Ch. 3 - The following problems consider launching a...Ch. 3 - The following problems consider launching a...
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