Question

Help me solve?
f-1(4) when f(x) = 3x minus 4, all over 5

Answer 1

So far I got...
f(x) = 3x - 4 / 5
f(-1) = 3(-1) - 4 / 5

Answer 2

Are you looking for the inverse or f(-1)?

From what I can tell is, you need the inverse the notation of inverse is often this: \[f^{-1}(x)\] so is this what you're looking for, if so f(-1) has nothing to do with it.

Answer 3

Here are a few rules for the inverse,

To find the inverse:

Replace f(x) with y
Switch x's and y's, so put x where y is and x where y is.
Solve for y
Replace y with f^-1(x)

Answer 4

I don't understand how the new equation would be set up.. @iambatman

Answer 5

You didn't answer my question yet, are we doing inverses?

Answer 6

I believe so...I put exactly what my question says.@iambatman

Answer 7

@iambatman