计算:y/(y²-x²)-1/(x-y)=_______

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/29 01:21:00

计算:y/(y²-x²)-1/(x-y)=_______

y/(y²-x²)-1/(x-y)
=y/(y-x)(y+x)+(y+x)/(y-x)(y+x)
=(2y+x)/(y-x)(y+x)

(2y+x)/(y²-x²)