如果x/2=y/3,那么x+y/x-y=
问题描述:
如果x/2=y/3,那么x+y/x-y=
2a与32a的比例中项
答
由x/2=y/3推出x=2y/3
所以(x+y)/(x-y)
=(2y/3+y)/(2y/3-y)
=(5y/3)/(-1y/3)
=-5