作业帮当-1
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/01 11:56:00
x){wMR>_`g,l'{뀹چ5@FRרF_HjjWj*l
u
L<;6`*D{~O mѺ`;6iTkVjm5D 5Y
当-1
当-1
当-1
泪伤157,
(y+1)/|y+1|-|y-2|/(y-2)+y/|y|
=1-1+1
=1
(y+1)/|y+1|-|y-2|/(y-2)+y/|y|
=1-1+1
=1
1
原式＝（y+1)/(y+1)-[-(y-2)/(y-2)+(y/(-y)]=1+1-1=1