underset(x to oo)lim [sqrt(x+sqrt(x+sqrt...

`underset(x to oo)lim [sqrt(x+sqrt(x+sqrt(x)))-sqrtx]=`

A

`(1)/(2)`

B

`(-1)/(2)`

C

`(1)/(3)`

D

`(-1)/(3)`

Verified by Experts

The correct Answer is:

A

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