Question

If f(x)=7x and g(x)= 3x+1, find ( fog ) (x)

Answer 1

21x+7 is correct

Explanation:

Answer 2

Option B is correct

The value of
`(fog)(x)` is, 21x+7

Explanation:

Given the functions:

`f(x) = 7x`

`g(x) = 3x+1`

We have to find
`(fog)(x)`

`(fog)(x) = f(g(x))`

substitute the function g(x) we have;

`(fog)(x) = f(3x+1)`

Replace the value of x from 3x+1 in f(x) we have;

`(fog)(x) =7(3x+1)`

⇒
`(fog)(x) = 21x+7`

Therefore, the value of
`(fog)(x)` is, 21x+7