यदि phi(x)=2cos^(-1)((2)/(sqrt(x)))+sin^...

यदि `phi(x)=2cos^(-1)((2)/(sqrt(x)))+sin^(-1)((4sqrt(x-4))/(x))` है,
तो `phi'(9)` का मान है : (i) 0 (ii) `2/3` (iii) `(sqrt(5))/(3)` (iv) `(6)/(5sqrt(5))`

A

`0`

B

`(2)/(3)`

C

`(sqrt(5))/(3)`

D

`(6)/(5sqrt(5))`

लिखित उत्तर

Verified by Experts

The correct Answer is:

A

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