Question

Find the inverse of the function f(x) = (2x+5)/3

Answer 1

$$x=\frac{2f^{-1}(x)+5}{3}$$ Now I am sure you can do the rest

Answer 2

wait, so I'm not sure what to do, I don't understand functions. Do I simplify?

Answer 3

$$f^{-1}(x)$$ is the inverse function of f, this means that $$f(f^{-1}(x))=x$$

Answer 4

Substituting $$f^{-1}(x)$$ in for the x appearing in that expression we get

Answer 5

$$x=\frac{2f^{-1}(x)+5}{3}$$

Answer 6

so is it x^2 +5 / 3

Answer 7

Now solving for $$f^{-1}(x)$$ gives us, $$\frac{3x-5}{2}=f^{-1}(x)$$.

Answer 8

what?? how did you come up with that?
this is so confusing

Answer 9

Try using khan academy or somthing

Answer 10

okay thanks

Answer 11

keywords are "functions/Inverse functions"