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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

(a)x=b is a point of local minimum

B

(b)x=b is a point of local maximum

C

(c)x=a is a point of local minimum

D

(d)x=a is a point of local maximum.

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