已知4x-5y+2z=0,且x+4y-3z=0,(xyz不等于0)试求x/y
问题描述:
已知4x-5y+2z=0,且x+4y-3z=0,(xyz不等于0)试求x/y
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.