Question

Function Help

Answer 1

Let f(x) = 2x - 6. Solve f-1(x) when x = 2.

-5

4

-2

7

Answer 2

phi, you can tell I'm confused on these, cant you :p?

Answer 3

Yes this is confusing.
f-1(x) when x = 2
means
\( f^{-1}(2) \)
that means find x in f(x) when f(x)=2

Answer 4

in other words, solve for x using
2=2x - 6

Answer 5

Ok so x would be 4

Answer 6

yes. The hard part is explaining how to interpret f-1(2) so that you know how to do the problem. (I have not figured out how to make it clear (yet!) )

Answer 7

Thanks again for your help. I still have a couple of them I need help but I'll open up new thread. Once you dwindle it down, it isn't hard to figure out but I don't get how to simplify like you do.