例X1X2 +X1X3+X1X4+X2X3+X2X4+X3X4 您说是X1=Y1+Y2 X2=Y1-Y2 X3=Y3 X4=Y4 为什么答案令X3 =Y3+Y4 X4=Y3-Y4
问题描述:
例X1X2 +X1X3+X1X4+X2X3+X2X4+X3X4 您说是X1=Y1+Y2 X2=Y1-Y2 X3=Y3 X4=Y4 为什么答案令X3 =Y3+Y4 X4=Y3-Y4
答
例X1X2 +X1X3+X1X4+X2X3+X2X4+X3X4 您说是X1=Y1+Y2 X2=Y1-Y2 X3=Y3 X4=Y4 为什么答案令X3 =Y3+Y4 X4=Y3-Y4