已知X、Y、Z满足方程组①2X-3Y=8②3Y+2Z=0③X-Z=-2,则XYZ的值是( ) A.0 B.-16 C.6
1个回答
答案是D -6
(1)+(2)可得2X+2Z=8进而X+Z=4 此方程与(3)相加可得X=1代入方程组可得
Y=-2,Z=3,从而XYZ=-6
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