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d/(dx)[tan^(-1)((a-x)/(1+ax))] is equal ...

`d/(dx)[tan^(-1)((a-x)/(1+ax))]` is equal to

A

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

B

`1/(1+a^2)-1/(1+x^2)`

C

`(1)/(1+((a-x)/(1+ax))^2)`

D

`(-1)/(sqrt(1-((a-x)/(1+ax))^2))`

Text Solution

Verified by Experts

The correct Answer is:
A
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