For the function f, use composition of functions to show that f-1 is as given.
, 
What will be an ideal response?
Answers may vary. One possible solution is:
1. (f-1 ? f)(x) = f-1(f(x)) = f-1
= 9
+ 2 = 
+ 2 = x;
2. (f ? f-1)(x) = f(f-1(x)) = f
= 
/9 = 9x/9 = x
Mathematics
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= 
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A. 
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