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For x epsilon(0,(5pi)/2), definite f(x)...

For `x epsilon(0,(5pi)/2)`, definite `f(x)=int_(0)^(x)sqrt(t) sin t dt`. Then `f` has

A

local maximum at `pi and 2pi`

B

local minimum at `pi and 2pi`

C

local minimum at `pi` and local maximum at `2pi`

D

local maximum at `pi` and local minimum at `2pi`

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