Question

If f(a) = K, then which of the following must be true? f(K) = a f -1(K) = a f -1(a) = K

Answer 1

when finding the inverse, the variables become switched
like f(x)=y
then f-1(y) = x

Answer 2

thanks for the help!

Answer 3

you're welcome :)
and Welcome to OpenStudy ^_^