Inverse function Khan Academy

Question

I'm doing an exercise on inverse functions on Khan Academy and cannot get with the first exercise. Where to find number $93$? There is no such number in the table...

By definition $f^{-1}$ is the function that undo the function $f$, which means that $f^{-1}(f(a))=a$ for all $a$ in the domain — lEm, Mar 19 '16 at 07:32

score 1 · Answer 1 · answered Mar 19 '16 at 07:40

1

By the definition of the inverse fuction, $$f^{-1}\left ( f(93) \right )=93.$$

answered Mar 19 '16 at 07:40

OGC

2,305

score 0 · Answer 2 · answered Mar 19 '16 at 07:31

0

Hint: what is the inverse function $f^{-1}$?

answered Mar 19 '16 at 07:31

Arthur

199,419

Ok thanks i got it!!! – NZMAI Mar 19 '16 at 07:35

Inverse function Khan Academy

2 Answers2