Question

If f(x) = x + 1, find f(x + 7). Hint: Replace x in the formula by x+7.f(x + 7) =

Answer 1

The original function is:

`f(x)\text{ = x+1}`

We want to find the value of the function when the input is "x + 7". So in the place of the original "x" we will add "x+7".

`\begin{gathered} f(x+7)\text{ = (x+7)+1} \\ f(x+7)\text{ = x+7+1} \\ f(x+7)\text{ = x+8} \end{gathered}`

The value of the expression is "x + 8"