Question

F(x)=3x+2 and g(x)=x^3 find (fog)(-5)

Answer 1

Answer:

Explanation:

f(x) = 3x+2
g(x) = x^3

(f • g)(x) = (3x+2)(x^3)
(f • g)(x) = 3x^4 + 2x^3
(f • g)(-5) = 3(-5)^4 + 2(-5)^3
(f • g)(-5) = 3(625) + 2(-125)
(f • g)(-5) = 1875 - 250
(f • g)(-5) = 1625