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If m and n are positive integers and f(x...

If m and n are positive integers and `f(x) = int_1^x(t-a )^(2n) (t-b)^(2m+1) dt , a!=b`, then

A

`x=b` is a point of local minimum

B

`x=b` is a point of local maximum

C

`x=a` is a point of local minimum

D

`x=a` is a point of local maximum

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