题库搜索>问题求解PS-13088
If x + y + z = 0, x + 2y + 3z = 0, and y ≠ 0, then xy =
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
x+2y=3x+3y
-y=2x
x/y=-1/2
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