已知lg(x³+2y³)=lgx+lgy+lg(2x+y),求(x+2y )/(3x-y)
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已知lg(x³+2y³)=lgx+lgy+lg(2x+y),求(x+2y )/(3x-y)
已知lg(x³+2y³)=lgx+lgy+lg(2x+y),求(x+2y )/(3x-y)
已知lg(x³+2y³)=lgx+lgy+lg(2x+y),求(x+2y )/(3x-y)