Explore and Discuss 1 A student produced the following solution to Matched Problem 4: C ( x ) = 7 , 000 + 2 x Cost C ′ ( x ) = 2 Marginal cost C ′ ( x ) x = 2 x “Average” of the marginal cost Explain why the last function is not the same as the marginal average cost function.
Explore and Discuss 1 A student produced the following solution to Matched Problem 4: C ( x ) = 7 , 000 + 2 x Cost C ′ ( x ) = 2 Marginal cost C ′ ( x ) x = 2 x “Average” of the marginal cost Explain why the last function is not the same as the marginal average cost function.
Solution Summary: The author explains that the average of the marginal cost function is not the same.
4.3 The Chain Rule
1. {Algebra review} Let f(x)=2x²-5 x and g(x)=6x+2. Find f[g(−5)].
2. {Algebra review} Write h(x)=√√8x-3 as the composite of two functions f(x) and g(x). (There may be more
than one way to do this.)
4.4 Derivatives of Exponential Functions
1. Find derivatives of the functions defined as follows.
a. g(t)=-3.4e
b. y=e√x
c. f(x)=(4x³+2)e³*
d. y=-
x²
4.5 Derivatives of Logarithmic Functions
1. Find the derivative of each function.
a) y=ln (-3x)
b) f(u)=nu
c) 9(x)=x-1
lnx
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