若4x-3y=0,则4x-5y/4x+5y的值是?
来源:百度知道 编辑:UC知道 时间:2024/09/22 16:39:35
4x-3y=0,那么4x=3y
所以(4x-5y)/(4x+5y)=(3y-5y)/(3y+5y)=-1/4
负四分之一
4x=3y
x=3y/4
4x-5y/4x+5y=3y-5y/3y+5y=-1/4
-1/4 (Y不为0)
4x-3y=0
4x=3y
4x-5y/4x+5y=(3y-5y)/(3y+5y)=2y/8y=1/4
当x y都不等于0时原式等于-1/4;当x y等于0时原式无解
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