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

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

A

Increases in `[0, oo)`

B

Decreases in `[0, oo)`

C

Neither increases nor decreases in `(0, oo)`

D

Increases in `(-oo, oo)`

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The correct Answer is:

A, D

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