[原创]求助一题0601math jj 23 感谢

gooder

23. (x+y)/(x-y) [(1/x+1/y)/(1/x-1/y)]=????
[(1/x+1/y)/(1/x-1/y)]=（y+x）/（y-x)
(x+y)/(x-y) [(1/x+1/y)/(1/x-1/y)]=-1
这题看了解答还是算不出来,麻烦一下各位,谢谢

mymengming

题目的表达问题，(x+y)/(x-y) [(1/x+1/y)/(1/x-1/y)]

[(1/x+1/y)/(1/x-1/y)]是乘在分子上的

gooder

嗯
            了解了  谢谢