Check back... Remember that I said we had to restrict it to | ? |
Well, here's the graph of
for | : |
Oh! THIS guy IS one-to-one! Get it now? |
You saw why this is such a big stinkin' deal in the second section.
YOUR TURN:
Does | have an inverse function? |
* Just graph it and see if it's one to one.
Does | have an inverse function? |
If it doesn't, fix it so that it does.