1.

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

Answer»

`(a+B)/2int_(a)^(b)F(b-X)DX`
`(a+b)/2int_(a)^(b)f(b+x)dx`
`(b-a)/2int_(a)^(b)f(x)dx`
`(a+b)/2int_(a)^(b)f(x)dx`

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