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If int(a)^(b)(f(x))/(f(x)+f(a+b-x))dx=10...

If `int_(a)^(b)(f(x))/(f(x)+f(a+b-x))dx=10`, then

A

`(a+b)/(2)`

B

`(a-b)/(2)`

C

`(b-a)/(2)`

D

none of these

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