If f(x)=5x^3 and g(x)=x+1, find (f.g)(x) A. 5x^3+1 B. 5x^4+5x^3 C. 5x^4+1 D. 6x^3

asked Oct 17, 2020 27.8k views

2 votes

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

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

6.2k points

Please log in or register to add a comment.

2 votes

Answer:

B. 5x^4+5x^3

Explanation:

(f.g)(x) = f(x) * g(x) = 5x^3 * (x+1)

= 5x^3 * x + 5x^3 * 1

= 5x^4 + 5x^3

Theo Strauss answered Oct 20, 2020

5.6k points

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

6.0m questions

7.9m answers