A non-zero function f(x) is symmetrical ...

A non-zero function `f(x)` is symmetrical about the line `y=x` then the value of `lambda` (constant) such that `f^(2)(x)=(f^(-1)(x))^(2)- lambda x f(x) f^(-1)(x)+3x^(2)f(x) AA x in R^(+)` is

A

1

B

2

C

3

D

4

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The correct Answer is:

C

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