1. Consider the function 1(2) = - - dz -3 a) Determine f(-4), f(»), and f(a + h).

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter2: Functions And Graphs
Section2.6: Proportion And Variation
Problem 18E
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Question 1C
1. Consider the function
S(2) = -s² – 4z – 3
a) Determine f(-4), S(a), and f(a +h).
b) Determine the average rate of change of f(z) over the interval [a, z), in other words
determine
f(2) – f(a)
Also, recall from class that the derivative of f(z) at a is given by
S(2) – S(a)
L'(a) - lim
Follow an algebraic approach, i.e. properly simplify the above ratio and calculate f'(a).
c) This time, calculate the difference quotient
f(a + h) – f(a)
and recall that, as h0, the above difference quotient will also approach the derivative
of f(z) at a,
other words,
f(a) = i
S(a + h) – f(a)
The limit from part b) should agree with the above limit, in the sense that we should
obtain the same answers for f'(a) regardless of which approach we would follow.
Perform the calculations for f'(a) by following the difference quotient path and demon-
strate that the answers from part b) and c) are indeed the same.
Transcribed Image Text:1. Consider the function S(2) = -s² – 4z – 3 a) Determine f(-4), S(a), and f(a +h). b) Determine the average rate of change of f(z) over the interval [a, z), in other words determine f(2) – f(a) Also, recall from class that the derivative of f(z) at a is given by S(2) – S(a) L'(a) - lim Follow an algebraic approach, i.e. properly simplify the above ratio and calculate f'(a). c) This time, calculate the difference quotient f(a + h) – f(a) and recall that, as h0, the above difference quotient will also approach the derivative of f(z) at a, other words, f(a) = i S(a + h) – f(a) The limit from part b) should agree with the above limit, in the sense that we should obtain the same answers for f'(a) regardless of which approach we would follow. Perform the calculations for f'(a) by following the difference quotient path and demon- strate that the answers from part b) and c) are indeed the same.
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