In(G(x)>In p+nIn In pn< +nIn 1-x6 1-x6x y tnIn 1-x6n x n x x x n x x p x G x p n n n  + − −   + −    + 1 6 1 ln 1 6 ln 1 ln( ( )) ln ln 2 2    令 x n x x y 1 ln 1 6 2  + − = 