If f(a + b - x) = fx, then inta^b x f(x)...

If `f(a + b - x) = fx`, then `int_a^b x f(x) dx` is equal to :

A

`(a+b)/2int_(a)^(b)f(b-x)dx`

B

`(a+b)/2int_(a)^(b)f(b+x)dx`

C

`(b-a)/2int_(a)^(b)f(x)dx`

D

`(a+b)/2int_(a)^(b)f(x)dx`

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The correct Answer is:

D

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