Question

If f(x) = x2 + 1, find f(3).

Everytime I do this problem I get 8, but I know that's wrong because my answer choices are:
10
7
4
2

Answer 1

If you plug in 3 for x, you get (3)(3) = 9.
add one to that, and what do you get?

Answer 2

\[(3)^2 = (3)(3) \]
similarly
\[(3)^7 = (3)(3)(3)(3)(3)(3)(3) \]
and so on.

Answer 3

ohhhh... okay. :) Now I get it. Instead of doing (3)(3), I was doing 3^2... duh!!! lol... THANKS!!

Answer 4

and then I wasn't adding the 1 on... lol.