已知xyz不等于0,且x/3=y/4=z/5,求【2x-3(2y-z)】/x+y+z
问题描述:
已知xyz不等于0,且x/3=y/4=z/5,求【2x-3(2y-z)】/x+y+z
答
设X/3=Y/4=Z/5=K,然后表示出X,Y,Z,再代入求解,答案应该是-1/4
已知xyz不等于0,且x/3=y/4=z/5,求【2x-3(2y-z)】/x+y+z
设X/3=Y/4=Z/5=K,然后表示出X,Y,Z,再代入求解,答案应该是-1/4