Question

lim △x->0 ([2{-2+△x)³ -2(-2 +△x) -2] -(-14))/ △x represents f'(c) for a function f(x) and a number c. Find f(x) and c.

a. f(x) = 2x³ - 8x² - 10
b. c = 1
c. f(x) = -2x³ + 8x² + 10
d. c = -1