![Precalculus with Limits](https://www.bartleby.com/isbn_cover_images/9781133947202/9781133947202_largeCoverImage.gif)
Concept explainers
a.
Describe the effect on the graph when
a.
![Check Mark](/static/check-mark.png)
Answer to Problem 83E
The curve become wider.
Explanation of Solution
Given information:
Consider the parabola
Use a graphing utility to graph the parabola for
Calculation:
Consider the equation of parabola,
Now Use a graphing utility to graph the parabola for
Hence, the curve become wider as increases the value of
b.
Locate the focus for each parabola.
b.
![Check Mark](/static/check-mark.png)
Answer to Problem 83E
Explanation of Solution
Given information:
Consider the parabola
Locate the focus for each parabola in part (a).
Calculation:
Consider the equation of parabola,
Now Use a graphing utility to graph the parabola for
We need to locate the focus for each parabola drawn above, Since each parabola has its axis vertical, the focus is located at the point
Hence the foci are located at
c.
How can the length of the latus rectum be determined directly from the standard form of the equation of the parabola?
c.
![Check Mark](/static/check-mark.png)
Answer to Problem 83E
Explanation of Solution
Given information:
Consider the parabola
For each parabola in part (a), find the length of the latus rectum (see figure). How can the length of the latus rectum be determined directly from the standard form of the equation of the parabola?
Calculation:
Find the length of the latus rectum for each parabola drawn in part
Let consider the case of the parabola with
The equation of parabola is,
Also, the focus as found above is
Thus the point at which the latus rectum intersects the parabola has its
Now substitute
Thus, the length of the latus rectum is
Since the length of the latus rectum in other cases be
Hence, the length of the latus rectum is
d.
Explain how the result of part (c) can be used.
d.
![Check Mark](/static/check-mark.png)
Answer to Problem 83E
locate two points in the parabola quite easily
Explanation of Solution
Given information:
Consider the parabola
Explain how the result of part (c) can be used as a sketching aid when graphing parabolas.
Calculation:
The latus rectum can be useful since it gives us two points on the parabola directly by looking at its standard equation.
Since we can locate two points in the parabola quite easily.
Chapter 10 Solutions
Precalculus with Limits
- Do the Laplace Transformation for this equation in Partial Fractions.arrow_forwardUse undetermined coefficients to find the particular solution to y"-2y-4y=3t+6 Yp(t) =arrow_forwardCar A starts from rest at t = 0 and travels along a straight road with a constant acceleration of 6 ft/s^2 until it reaches a speed of 60ft/s. Afterwards it maintains the speed. Also, when t = 0, car B located 6000 ft down the road is traveling towards A at a constant speed of 80 ft/s. Determine the distance traveled by Car A when they pass each other.Write the solution using pen and draw the graph if needed.arrow_forward
- The velocity of a particle moves along the x-axis and is given by the equation ds/dt = 40 - 3t^2 m/s. Calculate the acceleration at time t=2 s and t=4 s. Calculate also the total displacement at the given interval. Assume at t=0 s=5m.Write the solution using pen and draw the graph if needed.arrow_forwardThe velocity of a particle moves along the x-axis and is given by the equation ds/dt = 40 - 3t^2 m/s. Calculate the acceleration at time t=2 s and t=4 s. Calculate also the total displacement at the given interval. Assume at t=0 s=5m.Write the solution using pen and draw the graph if needed.arrow_forward4. Use method of separation of variable to solve the following wave equation მłu J²u subject to u(0,t) =0, for t> 0, u(л,t) = 0, for t> 0, = t> 0, at² ax²' u(x, 0) = 0, 0.01 x, ut(x, 0) = Π 0.01 (π-x), 0arrow_forwardSolve the following heat equation by method of separation variables: ди = at subject to u(0,t) =0, for -16024 ძx2 • t>0, 0 0, ux (4,t) = 0, for t> 0, u(x, 0) = (x-3, \-1, 0 < x ≤2 2≤ x ≤ 4.arrow_forwardex 5. important aspects. Graph f(x)=lnx. Be sure to make your graph big enough to easily read (use the space given.) Label all 6 33arrow_forwardDecide whether each limit exists. If a limit exists, estimate its value. 11. (a) lim f(x) x-3 f(x) ↑ 4 3- 2+ (b) lim f(x) x―0 -2 0 X 1234arrow_forwardDetermine whether the lines L₁ (t) = (-2,3, −1)t + (0,2,-3) and L2 p(s) = (2, −3, 1)s + (-10, 17, -8) intersect. If they do, find the point of intersection.arrow_forwardConvert the line given by the parametric equations y(t) Enter the symmetric equations in alphabetic order. (x(t) = -4+6t = 3-t (z(t) = 5-7t to symmetric equations.arrow_forwardFind the point at which the line (t) = (4, -5,-4)+t(-2, -1,5) intersects the xy plane.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9781285741550/9781285741550_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780134438986/9780134438986_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780134763644/9780134763644_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781319050740/9781319050740_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780135189405/9780135189405_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337552516/9781337552516_smallCoverImage.gif)