Calculate the derivative of the function. Then find the value of the derivative as specified.f(x) = 
; f '(-1)
A. f '(x) = 8; f '(-1) = 8
B. f '(x) = - 8x2; f '(-1) = - 8
C. f '(x) = 
; f '(-1) = 8
D. f '(x) = - 
; f '(-1) = -8
Answer: D
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A. 
B. 
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D. 
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