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f(x)>0AAx in Ra n di sbou n d e ddotIf ...

`f(x)>0AAx in Ra n di sbou n d e ddotIf` `(lim)_(nvecoo)[int_0^a(f(x)dx)/(f(x)+f(a-x))+a^2+aint_a^(2a)(f(x)dx)/(f(x)+f(3a-x))+int_(2a)^(3a)(f(x)dx)/(f(x)+f(5a-x))++a^(n-1)int_((n-1)a)^(n a)(f(x)dx)/(f(x)+f[2n-1)a-x])]=7//5` (where `a<1),` then `a` is equal to `2/7` (b) `1/7` (c) `(14)/(19)` (d) `9/(14)`

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