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If f(x) =(e^x)/(1+e^x), I1=int(f(-a))^(f...

If `f(x) =(e^x)/(1+e^x), I_1=int(f(-a))^(f(a)) xg(a(1-x)dx, and I_2=int_(f(-a))^(f(a)) g(x(1-x))dx,` then the value of `(I_2)/(I_1)` is (a) `-1` (b) `-2` (c) `2` (d) `1`

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