Question

considere as funçoes f(x)=4x-7, g(x)=x^2-2 e h(x)=8-2x calcule : x tal que f(f(x))=2

Answer 1

f(x)=4x-7
f(f(x))=4f(x)-7=2
f(f(x))=4(4x-7)-7=2
16x-28-7=2
16x-35=2
16x=37
x=37/16