2. If f(x) = x - 7 and g(x) = 2x + 5, then what is f(x) * g(x)?
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An inverse function is a function that reverses another function, so we have a function called:
Then, the inverse function will be as follows:
Given that
, we need to isolate x in terms of y:
∴
So:
and 
therefore, exchanging variables x and y:
and 
and 
Which are the figures shown below.
Then, the inverse function will be as follows:
Given that
∴
So:
therefore, exchanging variables x and y:
Which are the figures shown below.