Question

If f(x) = x + 1, find f (x + 12).

Answer 1

f(x) = x + 1

To find f (x + 12), you have to replace the x-variable in the function with the value x+12, as follows:

f(x+12) = (x + 12) + 1

f(x+12) = x + (12 + 1)

f(x+12) = x + 13