Question

Dik.f(x)=x+1 ,g(x) =x² dan h(x)=3x. tentukan fogoh(-5)?

Answer 1

F(x) = x+1
g(x) = x^2
h(x) = 3x
fogoh(-5) = ...?

goh (x) = g(h(x)) = (3x)^2 = 9x^2
fogoh (x) = f(g(h(x))) = 9x^2 + 1

f(g(h(x))) = 9(-5)^2 + 1 = 9(25) + 1 = 226