李易峰178
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(999-1000)(999+1000)=-1999
1.858²-558²=(858+558)(858-558)=1416*300=4248002.202²+202×196+98²=(202+98)²=
Helloeverybody,I'mJessica.TodayIwouldliketointroducethisalbum.BoyonthescreenismyidolLiYiFeng,itishis
(2²+4²+6²+8²+10²)-(1²+3²+5²+7²+9²)=(2²-1²
请问您上几年级,好用你们学过的方法解初中方式:原式=(10+9)(10-9)+(8+7)(8-7)+(6+5)(6-5)+(4+3)(4-3)+(2+1)(2-1)=19*1+15*1+11*1+7*
1²-2²+3²-4²+5²-6²+…+99²-100²=(1+2)(1-2)+(3+4)(3-4)+...+(99+1
是呀,不过,最好MF们都想想,想个好听的哈~
20²-19²=(20+19)×(20-19)=20+1918²-17²=(18=17)×(20-19)=18+17以此类推20+19+18+17+16……用高
Iamgladtocommunicatewitheveryonehere.TodayIreportisthemaincontentofmymalegod:liyifeng.Originallylike
(n+1)^3-n^3=3n^2+3n+1, n^3-(n-1)^3=3(n-1)^2+3(n-1)+1 . 3^3-2^3=3*(2^2)+3*2+1 2^3-1^3=3*(1^2)+3*1
(10-9)(10+9)+(8-7)(8+7)+……+(2-1)(2+1)=10+9+8+……+2+1=(10+1)*10/2=55
强烈怀疑你第六题多打了一个1/(1+2),如果你确定没有打错,那么我第六题解题结果你加上1/3即可.唉,打分数真不容易
1²-2²+3²-4²+.+99²-100²+101²=101²-100²+...+3²-2
AB型1987年5月4日成都贺贺,小草,校草,峰锅蜜蜂没英文名四川师范大学电影电视学院
Inthistime,theentertainmentcircleisprobablythemost"colorful",itisalargenumberofstars,theynaturallybe
平方差=(2009+2008)(2009-2008)+……+(2+1)(2-1)=2009+2008……+2+1=2010×2009÷2=2019045再问:对对对,就是这样,总算想起来了,我们老师昨
(a²+b²)²-(2ab)²=[(a²+b²)+(2ab)]*[(a²+b²)-(2ab)]=(a²-b
Name:LiYifengFormerlyknownas:LiNickname:NationalSchoolgrass,grass,grass,grasspeak,baby,babyPlaceofbi
原式=-(2^2-1)-(4^2-3^2)-(6^2-5^2)-(8^2-7^2)-(10^2-9^2) =-(2+1)(2-1)-(4+3)(4-3)-(6+5)(6-5)-(8+7)(8-7)-