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文[1]、文[2]提出并证明了:结论1如图1,已知点G是△ABC的重心,过G作直线与AB、AC两边分别交于M、N,且(?)= (?),则1/x+1/y=3．
[1] and [2] proposed and proved: The conclusion 1 is shown in Fig. 1. Known point G is the center of gravity of △ABC. G over the straight line and AB and AC are respectively intersected at M and N, and (?) = (?), then 1/x+1/y=3.