If f(x)= ^ -1 ( 2x 1+x^ 2 )+ ^ -1 ( 1-x^ 2 1+x^ 2 ), x (1, ), then f'(x)=

MHT CET 2022 Mathematics question

If , then

Answer: (B)

Put , for . Then (since ), and (since

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Question ID VK-097199