If int(0) ^(k) (dx)/(2+18 x^(2))=(pi)...

If ` int_(0) ^(k) (dx)/(2+18 x^(2))=(pi)/(24),` then the value of k is

A

`3`

B

`4`

C

`(1)/(3)`

D

`(1)/(4)`

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The correct Answer is:

C

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