Q. 435.0( 2 Votes )

Mark the correct alternative in each of the following:

If f : R (–1, 1) is defined by then f–1(x) equals

A.

B.

C.

D. none of these

Answer :

Given that f : R (–1, 1) is defined by



Here for mod function we will consider three cases, x = 0, x<0 and x>0.


For x< 0




y(1 + x2) = x2


x2 (1 – y) = y




Also, checking on x>0 and x = 0 we find that


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