2013-04-27
展开全部
(a-2分之1-a+2分之1)除以2-a分之2
=[1/(a-2)-1/(a+2)]/[2/2-a)]
=[(a+2)/(a+2)(a-2)-(a-2)/(a+2)(a-2)]/[-2/(a-2)]
=[4/(a+2)(a-2)]/[-2/(a-2)]
=-2/(a+2)
=[1/(a-2)-1/(a+2)]/[2/2-a)]
=[(a+2)/(a+2)(a-2)-(a-2)/(a+2)(a-2)]/[-2/(a-2)]
=[4/(a+2)(a-2)]/[-2/(a-2)]
=-2/(a+2)
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询