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If y = "cos^(-1)((2x)/(1 + x^2)), then ...

If `y = "cos^(-1)((2x)/(1 + x^2))`, then `(dy)/(dx)` is

A

`(-2)/(1 + x^2)` for all x

B

`(-2)/(1 + x^2)` for all `|x| lt 1`

C

`(2)/(1 + x^2)` for `|x| gt 1`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B, C
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