Question

Sendo f (x) = 3 - 2 x 8 , a f ´ ( - 1 ) é igual: a)4 b)16 c)1 d)- 3 e)- 16

Answer 1

-1 = 3-2x+8
-9 = 3-2x
-6 = 2x
x = $\frac{-6}{2}$
x = -3

letra d)