化简:分式加减化简:(2x-y-z)/(x-y)(x-z)+(2y-z-x)/(y-z)(y-x)+(2z-y-x)/(z-y)(z-x)

问题描述:

化简:分式加减
化简:(2x-y-z)/(x-y)(x-z)+(2y-z-x)/(y-z)(y-x)+(2z-y-x)/(z-y)(z-x)