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Let f: R rarr R be a continuous odd func...

Let `f: R rarr R` be a continuous odd function, which vanishes exactly at one point and `f(1)=1/2`. Suppose that `F(x)=int_(-1)^xf(t)dt` for all `x in [-1,2]` and `G(x)=int_(-1)^x t|f(f(t))|dt` for all `x in [-1,2]`. If `lim_(x rarr 1)(F(x))/(G(x))=1/(14)`, Then the value of `f(1/2)` is

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