最新数列通项公式之累加法与累乘法知识分享.doc

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1、__________________________________________________1.已知数列满足，求数列的通项公式。2.已知数列中，，求数列的通项公式；3.已知数列满足，求数列的通项公式。4.已知数列中，，求数列的通项公式.收集于网络，如有侵权请联系管理员删除__________________________________________________1.已知数列中:a1＝1，an＝an－1(n≥2),确定数列{an}的通项公式2.已知数列{}满足=，，求3.在数列{}中，求通项公式。8.已知数列满足，求数列的通

2、项公式。初中英语八大时态综合时态练习(   )1.What_____you_____overtheweekend?             A.will;do            B.does;do          C.did;do            D.were,;doing(   )2.XiaoLiusually_____toschoolbybikelastyear.A.goes                B.went                C.willgo             D.isgoing(   )3.

3、What_____inourtown100yearsfromnow?             A.happened        B.ishappened     C.hashappened  D.willhappen(   )4.Mr.Smith_____toseeyouinanhour.收集于网络，如有侵权请联系管理员删除__________________________________________________             A.came               B.hascome         C.will

4、come        D.comes(   )5._____you_____fromyourparentsrecently?             A.Did;hear        B.Have;heard    C.Do;hear         D.Will;hear(   )6.We_____TVathomethistimelastnight.A.werewatching B.watched           C.havewatched  D.wouldwatch(   )7.We_____over1500Englishwo

5、rdsbytheendoflastmonth.             A.havelearned   B.hadlearned     C.willlearn       D.learnt(   )8.She_____inShanghaifortenyearssince1992.A.haslived         B.hadlived         C.lived               D.willlive(   )9.She_____inShanghaifortenyears.        A.haslived      

6、   B.hadlived         C.lived               D.willlive(   )10.Weallknowthattheearth_____roundthesun.A.goes                B.went                C.isgoing           D.willgo(   )11.“Wherearetheboys?”  “They_____soccerontheplayground.”A.play                B.areplaying     

7、        C.wereplaying   D.played(   )12.Look!Lucy_____underthetree.A.reads              B.isreading        C.wasreading     D.read(   )13.He_____morethan200modelcarsinthelastfiveyears.A.hascollected   B.hadcollected   C.collected         D.willcollect(   )14.Jim_____alett

8、ertohisparentsat7:30lastnight.A.hadwritten     B.wrote              C.wouldwrite     D.waswritin