Question

What is the value of f(−1) when f(x)=2x+2

Answer 1

`f( - 1) = 0`

Explanation:

`f(x)=2x+2`

To find f(−1) , substitute the values of x that's - 1 into f(x). That is for every x in f(x) replace it with - 1

That's

`f( - 1) = 2( - 1) + 2 \\ = - 2 + 2`

We have the final answer as

`f( - 1) = 0`

Hope this helps you