Q. 555.0( 2 Votes )
Mark the correct alternative in each of the following:
Let
be defined by
Then,
A. f–1(x) = x
B. f–1(x) = –f(x)
C. fof (x) = x
D. 
Answer :
Given that
For f-1:
⇒ y(5x – 3) = 3x + 2
⇒ x ( 5y – 3) = 2 + 3y
So,
⇒ fof(x) = x
Hence, option C is correct.
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