已知4x-5y+2z=0,且x+4y-3z=0,(xyz不等于0)试求x/y
人气:388 ℃ 时间:2019-08-17 13:06:13
解答
4x-5y+2z=0,乘3,12x-15y+6z=0
x+4y-3z=0,乘2,2x+8y-6z=0
两式相加,14x-7y=0
2x=y
x/y=1/2.
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