Hi! How do you do question 2 on page 100 from the functions section? I reviewed the solution in the back of the book but still don’t understand.

If the solution in the back isn’t helping, let’s try plugging in real numbers here. Let’s say . If that’s the case, then the function says , or . What about if ? Well, that will simplify to . If you keep going, you’ll get , , , and so on.

So what’s the simple function doing? It’s just taking its input and adding 2. Right? Once we know that, we can just say that .

From there, what happens if we do ?

Does that help?