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The derivative of sec^(-1)((1)/(2x^(2)-1...

The derivative of `sec^(-1)((1)/(2x^(2)-1))` w.r.t. `sqrt(1-x^(2))` at `x=1/2` is

A

(-4)

B

4

C

2

D

(-2)

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The correct Answer is:
B
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