math
posted by Altagracia on .
true or false? the function f1 (x)x/9 is the inverse function of f(x)=9x

Use the inverse test:
If g(x) is the inverse of f(x), then
f(g(x))=x
Try it:
Let g(x)=x/9
f(x)=9x
f(g(x))=f(x/9)=9(x/9)=x
What is your conclusion?