Question

is this true?? my teacher said so? f^-1(f^-1(x))=f(x) ???
so far it looks like it isn't?? but i'm not sure if i heard my teacher right?

Answer 1

I think you misheard. It should be

\[\Large f^{-1}(f(x)) = x\]

or

\[\Large f(f^{-1}(x)) = x\]

if f(x) has an inverse

Answer 2

yep

Answer 3

...if f has an inverse

Answer 4

oh, yep to jim

Answer 5

i heard our teacher mention the statements that you mentioned up there, jim. for some reason, i also had this statement written down in my notes. but oh well, i'll just ask her again. thank you!