Question

If f(x) = 5x^3 and g(x) = x+1, find (f•g)(x).

A. 5x^4+1
B. 5x^3+1
C. 5x^4+5x^3
D. 6x^3

Answer 1

If f(x) = 5x^3 and g(x) = x+1, find (f•g)(x).

Note: (f•g)(x) means f(x) times g(x).

(f•g)(x) = (5x^3)(x + 1)

(f•g)(x) = 5x^4 + 5x^3

Answer: Choice C