Question

If f(x) = 4x and g(x) = x^3, then what is f(g(x))?

a. 4x+x^3
b. 4x^4
c. 4x^3
d. (4x)^3

Answer 1

f(g(x)) = 4x³

Hence, option C is true.

Explanation:

Given

• 
  `f(x) = 4x`

• 
  `g\left(x\right)\:=\:x^3`

Determine:

f(g(x)) = ?

solving the f(g(x))

f(g(x)) = f(x³)

= 4x³

Therefore,

f(g(x)) = 4x³

Hence, option C is true.