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true or false? the function f-1 (x)-x/9 is the inverse function of f(x)=9x

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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?

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