请根据以上规律计算:1/1*2+1/2*3+1/3*4+1/4*5+.......+1/99*100
我们知道 1-1\/2=1\/2;1\/2-1\/3=1\/6;1\/3-1\/4=12...请根据以上规律计算...
回答:原式=1-1\/2+1\/2-1\/3+1\/3-1\/4+1\/4-1\/5+……+1\/99-1\/100 =1-1\/100 =99\/100
我们知道 1-1\/2=1\/2;1\/2-1\/3=1\/6;1\/3-1\/4=12...请根据以上规律计算...
我们知道 1-1\/2=1\/2;1\/2-1\/3=1\/6;1\/3-1\/4=12...请根据以上规律计算 我来答 首页 用户 认证用户 视频作者 帮帮团 认证团队 合伙人 企业 媒体 政府 其他组织 商城 法律 手机答题 我的 我们知道 1-1\/2=1\/2;1\/2-1\/3=1\/6;1\/3-1\/4=12...请根据以上规律计算 ...
已知1-1\/2=1\/2,1\/2-1\/3=1\/6,1\/3-1\/4=1\/12,1\/4-1\/5=1\/20
1.已知条件就是告诉要裂项:1-1\/2=1\/2,1\/2-1\/3=1\/6,1\/3-1\/4=1\/12,1\/4-1\/5=1\/20 2.原式=1-1\/2+1\/2-1\/3+1\/3...+1\/2008-1\/2009 =1-1\/2009 =2008\/2009
1-1\/2=1\/2,1\/2-1\/3=1\/6,1\/3-1\/4=1\/12,1\/4-1\/5=1\/20,你发现了什么?_百 ...
我发现当减数与被减数分子均为一时,结果的分母等于减数与被减数分母的积,分子为一
已知1-1\/2=1\/2,1\/2-1\/3=1\/6,1\/3-1\/4=1\/12,..
-1\/2-1\/6-1\/12-……-1\/90 =-(1\/2+1\/6+1\/12+……+1\/90)=-(1-1\/2+1\/2-1\/3+1\/3-1\/4+……+1\/9-1\/10)=-(1-1\/10)=-9\/10
观察算式,寻找规律算数 1-1\/2= 1\/2-1\/3= 1\/3-1\/4= 算出得数,想一想...
因为[n(n+1)]分之1=n分之1-(n+1)分之1 所以1\/2+1\/6+1\/12+1\/20=5分之4
1\/2=1-1\/2,1\/6=1\/2-1\/3,1\/12=1\/3-1\/4,⋯请根据上面算式中的规律,完成...
解 原式 =(1-1\/2)+(1\/2-1\/3)+……+(1\/7-1\/8)=1+(1\/2-1\/2)+(1\/3-1\/3)+……+(1\/7-1\/7)-1\/8 =1-1\/8 =7\/8
1\/2=1-1\/2,1\/6=1\/2-1\/3,1\/12=1\/3-1\/4
1\/2+1\/6+1\/12+1\/20+1\/30+1\/42+1\/56 =1-1\/2+1\/2-1\/3+1\/3-1\/4+...+1\/7-1\/8 =1-1\/8 =7\/8;如果本题有什么不明白可以追问,如果满意记得采纳 如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。祝学习进步 ...
1\/2=1-1\/2,1\/6=1\/2-1\/3,1\/12=1\/3-1\/4...请根据以上的规律计算:1\/6+1\/...
解:1\/6+1\/12+1\/20+1\/30+1\/42 =(1\/2-1\/3)+(1\/3-1\/4)+(1\/4-1\/5)+(1\/5-1\/6)+(1\/6-1\/7)=1\/2-1\/3+1\/3-1\/4+1\/4-1\/5+1\/5-1\/6+1\/6-1\/7 =1\/2-(1\/3-1\/3)-(1\/4-1\/4)-(1\/5-1\/5)-(1\/6-1\/6)-1\/7 =1\/2-0-0-0-0-1\/7...
1\/2=1-1\/2 1\/6=1\/2-1\/3 1\/12=1\/3-1\/4...根据上述规律计算下题:1\/2+1...
原式=(1-1\/2)+(1\/2-1\/3)+(1\/3-1\/4)+(1\/4-1\/5)+(1\/5-1\/6)=1-1\/2+1\/2-1\/3+1\/3-1\/4+1\/4-1\/5+1\/5-1\/6 =1-1\/6 =5\/6