Although it is certainly “fair game” to ask such a question to determine whether you understand the concept, I always feel silly when I find out the answer – sort of like a little kid’s joke.

The concept of function is important – there is, at most, one y for each x.

An inverse function is also a function, but it goes the other way: there is., at most, one x for each y.

O.K., since g is the inverse function of f and f(2) = 6 then g(6)=2. (this seems silly to me)

Now, just to confuse us, the question writer gave TMI (too much information) with the part that says F(6)=5. That has nothing to do with our solution (unless you don’t understand the problem).

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