# Thread: One-to-one function

1. ## One-to-one function

Assume g is a one-to-one function.
If g(x) = x2 + 4x with x -2, find g -1(96).

Giving me hell, any help would be great. Thanks!

2. Originally Posted by TheOriginal08
Assume g is a one-to-one function.
If g(x) = x2 + 4x with x -2, find g -1(96).

Giving me hell, any help would be great. Thanks!
what do you mean "with x -2"?

Let $g^{-1}(96) = x$

$\Rightarrow g(x) = 96$

so set $g(x) = 96$ and solve for $x$

3. Not sure with the "with x-2" thats whats throwing me off. Thanks for your reply!