作业帮(1/a+b)-(1/a-b)=? @□@; p~l~ea~~se~~
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/10 18:50:30
(1/a+b)-(1/a-b)=? @□@; p~l~ea~~se~~
(1/a+b)-(1/a-b)=? @□@; p~l~ea~~se~~
(1/a+b)-(1/a-b)=? @□@; p~l~ea~~se~~
答：
1/(a+b)-1/(a-b)
=(a-b)/[(a+b)(a-b)]-(a+b)/[(a+b)(a-b)]
=[(a-b)-(a+b)]/(a^2-b^2)
=-2b/(a^2-b^2)
=2b/(b^2-a^2)
