Question

Given the function ƒ(x ) = 3x + 1, evaluate ƒ(a + 1).

Answer 1

`\Huge \boxed{3a+4}`

Explanation:

The function is given.

`f(x)=3x+1`

To find :
`f(a+1)`

The input for the function f(x) is (a + 1).

Replace x with (a + 1).

`f(a+1)=3(a+1)+1`

Expand brackets.

`f(a+1)=3a+3+1`

Simplifying.

`f(a+1)=3a+4`