Question

Dado f(x) = x^2+3x+1 y g(x) = 2x-3
Calcular :
A) (fog) (4)
B) (fof) (0)

Answer 1

f(x) = x²+3x+1
g(x) = 2x-3

(fog)(4) = f(g(4)) = f(2(4)-3) = f(5) = 5²+3(5)+1 = 41

(fof)(0) = f(f(0)) = f(1) = 5