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The points of extrema of the function f(...

The points of extrema of the function `f(x)= int_(0)^(x)(sin t)/(t)dt ` in the domain ` x gt 0` are-

A

`(2n+1) (pi)/(2), n=1,2,3,...`

B

`(4n+1) (pi)/(2), n=1,2,3,...`

C

`(2n+1) (pi)/(4), n=1,2,3,...`

D

`n pi, n=1,2,3,...`

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The correct Answer is:
D
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