a. Find the derivative function f' for the function f. b. Find an equation of the line tangent to the graph of f at (a, f(a)) for the given value of a.f(x) = 
; a = -1
A. a. f'(x) = - 
; b. tangent line is y = - 
x + 
B. a. f'(x) = - 
; b. tangent line is y = - x - 2
C. a. f'(x) = 
; b. tangent line is y = 
x + 
D. a. f'(x) = - 
; b. tangent line is y = - 
x + 
Answer: D
Mathematics
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A. r = 
B. r = 
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C. 
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