来自宋汉辰的问题
两个数学计算.a/b-(a-b)/b=x^2+xy/(x-y)÷xy/(x-y)
两个数学计算.
a/b-(a-b)/b=
x^2+xy/(x-y)÷xy/(x-y)
1回答
2020-10-10 04:20
两个数学计算.a/b-(a-b)/b=x^2+xy/(x-y)÷xy/(x-y)
两个数学计算.
a/b-(a-b)/b=
x^2+xy/(x-y)÷xy/(x-y)
a/b-(a-b)/b=(a-a+b)/b=b/b=1
(x^2+xy)/(x-y)÷xy/(x-y)
=(x^2+xy)/xy
=(x+y)/y