Solve.Let f(x) = 
. Show that f-1(x) = 7x - 4
What will be an ideal response?
Answers may vary. One possible solution is:
1. f-1 ? f
= f-1
= f-1
= 7
+ 4 = 
- 4 = x;
2. f ? f-1
= f
= f
= 
/7 = 7x/7 = x
Mathematics
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