Problem 62
Simplify the difference quotient ƒ(x+h)-ƒ(x)/h
ƒ(x) = 10
Problem 63
Use shifts and scalings to graph the given functions. Then check your work with a graphing utility. Be sure to identify an original function on which the shifts and scalings are performed.
Problem 64
Simplify the difference quotient ƒ(x+h)-ƒ(x)/h
ƒ(x) = 4x-3
Problem 65a
{Use of Tech} Height and time The height in feet of a baseball hit straight up from the ground with an initial velocity of 64 ft/s is given by h= ƒ(t) = 64t - 16t² where t is measured in seconds after the hit.
a. Is this function one-to-one on the interval 0 ≤ t ≤ 4?
Problem 65b
{Use of Tech} Height and time The height in feet of a baseball hit straight up from the ground with an initial velocity of 64 ft/s is given by h= ƒ(t) = 64t - 16t² where t is measured in seconds after the hit.
b. Find the inverse function that gives the time t at which the ball is at height h as the ball travels upward. Express your answer in the form t = ƒ⁻¹ (h)
Problem 65c
{Use of Tech} Height and time The height in feet of a baseball hit straight up from the ground with an initial velocity of 64 ft/s is given by h= ƒ(t) = 64t - 16t² where t is measured in seconds after the hit.
c. Find the inverse function that gives the time t at which the ball is at height h as the ball travels downward. Express your answer in the form t = ƒ⁻¹ (h)
Problem 65d
{Use of Tech} Height and time The height in feet of a baseball hit straight up from the ground with an initial velocity of 64 ft/s is given by h= ƒ(t) = 64t - 16t² where t is measured in seconds after the hit.
d. At what time is the ball at a height of 30 ft on the way up?
Problem 65e
{Use of Tech} Height and time The height in feet of a baseball hit straight up from the ground with an initial velocity of 64 ft/s is given by h= ƒ(t) = 64t - 16t² where t is measured in seconds after the hit.
e. At what time is the ball at a height of 10 ft on the way down?
Problem 66
Find a trigonometric function represented by the graph in the figure. <IMAGE>
Problem 67
Prove the following identities.
Problem 68
Prove the following identities.
Problem 73
Changing bases Convert the following expressions to the indicated base.
using base 5
Problem 75
Evaluating inverse trigonometric functions Without using a calculator, evaluate the following expressions.
Problem 75a
A GPS device tracks the elevation (in feet) of a hiker walking in the mountains. The elevation hours after beginning the hike is given in the figure. <IMAGE>
Find the slope of the secant line that passes through points and . Interpret your answer as an average rate of change over the interval .
Problem 75b
A GPS device tracks the elevation (in feet) of a hiker walking in the mountains. The elevation hours after beginning the hike is given in the figure. <IMAGE>
Repeat the procedure outlined in part (a) for the secant line that passes through points and .
Problem 75c
A GPS device tracks the elevation (in feet) of a hiker walking in the mountains. The elevation hours after beginning the hike is given in the figure. <IMAGE>
Notice that the curve in the figure is horizontal for an interval of time near hr. Give a plausible explanation for the horizontal line segment.
Problem 76
Roots and powers Sketch a graph of the given pairs of functions. Be sure to draw the graphs accurately relative to each other.
y = (x)¹⸍³ and y = (x)¹⸍⁵
Problem 77
In each exercise, a function and an interval of its independent variable are given. The endpoints of the interval are associated with points and on the graph of the function.
a. Sketch a graph of the function and the secant line through and .
b. Find the slope of the secant line in part (a), and interpret your answer in terms of an average rate of change over the interval. Include units in your answer.
After seconds, an object dropped from rest falls a distance , where is measured in feet and .
Problem 77b
Determine whether the following statements are true and give an explanation or counterexample.
Problem 77c
Determine whether the following statements are true and give an explanation or counterexample.
Problem 77d
Determine whether the following statements are true and give an explanation or counterexample.
Problem 77e
Determine whether the following statements are true and give an explanation or counterexample.
Problem 77f
Explain why or why not Determine whether the following statements are true and give an explanation or counterexample.
If , then .
Problem 77g
Explain why or why not Determine whether the following statements are true and give an explanation or counterexample.
If , then
Problem 78
Evaluating inverse trigonometric functions Without using a calculator, evaluate the following expressions.
Problem 79
Evaluating inverse trigonometric functions Without using a calculator, evaluate the following expressions.
Problem 80
Evaluating inverse trigonometric functions Without using a calculator, evaluate the following expressions.
Problem 81
Symmetry Determine whether the graphs of the following equations and functions are symmetric about the x-axis, the y-axis, or the origin. Check your work by graphing.
Problem 82
Evaluating inverse trigonometric functions Without using a calculator, evaluate the following expressions.
Problem 82c
Composition of polynomials
Let ƒ be an nth-degree polynomial and let g be an mth-degree polynomial.
What is the degree of the following polynomials?
ƒ ⋅ f
Ch. 1 - Functions
