Question

dada as funçoes f(x) x/2 - 1 e g(x)= 1-2x, determine g 0 f (x):
a) -x + 3
b) x + 3
c) x + 4
d) -x + 4
e) -x + 2

Answer 1

$g(f(x)) = 1 - 2 \times f(x) = \\ = 1 - 2 \times ( \frac{x}{2} - 1) = \\ = 1 - x + 2 = - x + 3$

Alternativa a).