Solve.Let f(x) = 
. Show that f-1(x) = 
What will be an ideal response?
Answers may vary. One possible solution is:
1. f-1 ? f
= f-1
= f-1
= 
= 
= 
= x;
2. f ? f-1
= f
= f
=
= 
= 
= x
Mathematics
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A. W = 
B. W = - 
C. W = 0
D. W = 
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A. ? B. ?
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, 0 < ? < 
; cos ? = 
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Find cos (? + ?).
A. 
B. 
C. 
D. 
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A. Origin only B. x-axis only C. y-axis only D. x-axis, y-axis, origin
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