f(x)=2x+cot^(-1)x+log (sqrt(1+x^(2))-x)...

`f(x)=2x+cot^(-1)x+log (sqrt(1+x^(2))-x)`

A

Decreases on `(0,oo)`

B

Decreases on `(-oo,0)`

C

Neither increase nor decreases on `(-oo,oo)`

D

Increeases on `(-oo,oo)`

Verified by Experts

The correct Answer is:

D

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