if f(x)=3^(x)-3^(-x), find : f(2), f(-1)

solution pls..

Plug in 2 for x and compute.

The first answer is 3^2 - 1/3^2
= 9 - 1/9 = 8 8/9

Then do it again wth x = -1.

This isn't calculus, yet. It's turning the crank and learning what a "function" is.