Question

Use f(x) = 2x − 5 and g(x) = 3 − x2
to evaluate the expression (f o f)(x) and
(g o g)(x)

Answer 1

f(x) = 2x − 5


f(f(x)) = 2f(x) − 5


f(f(x)) = 2(2x-5) − 5


f(f(x)) = 4x-10 - 5


f(f(x)) = 4x-15