- 问题详情:1.Quote…Unquote“Tostudyandnotthinkisawaste.Tothinkandnotstudyisdangerous.” ----Confucius,Chineseeducatorandthinker___________________________________________________________________________2.EverythingwasaboveandbeyondwhatIhadexpectedhere...
- 32792
- 问题详情:观察下列各式:(x﹣1)÷(x﹣1)=1(x2﹣1)÷(x﹣1)=x+1;(x3﹣1)÷(x﹣1)=x2+x+1(x4﹣1)÷(x﹣1)=x3+x2+x+1(1)根据上面各式的规律可得(xn+1﹣1)÷(x﹣1)= ;(2)求22019+22018+22017+……+2+1的值.【回答】解:(1)根据上面各式的规律,可得:(xn+1﹣1)÷(x﹣1)=xn+xn﹣1+…+x+1. (2)∵(xn+1﹣1)÷(x﹣1)=xn+xn﹣1+…+x+1,∴22019+22018+22017+……+2+1=(22020...
- 17232
- AsalesmanfromMotorolaorDelcomightstopby,withaquoteonresistors.WeregretbeingunabletoquoteonFOBbasis,asitisourgeneralpracticetodobusinesswithallourclientsonCIFterms....
- 7014
- 问题详情: (x-1)-(1-x)+(x+1)=3x-1.()【回答】∨知识点:整式的加减题型:填空题...
- 32947
- 问题详情:根据(x﹣1)(x+1)=x2﹣1,(x﹣1)(x2+x+1)=x3﹣1,(x﹣1)(x3+x2+x+1)=x4﹣1,…的规律,则可以得出22017+22016+22015+…+23+22+2+1的结果可以表示为 .【回答】22018﹣1.【解答】解:22017+22016+22015+…+23+22+2+1=(2﹣1)(22017+22016+22015+…+23+22+2+1)=22018﹣1.知识点:乘法公式题型:填空题...
- 30069
- Letmejustquotehim.Youmayquotemeonthat.That'sokay.Givethemaquote.TheyquoteTheDailyStar,whoquoteanunnamedScandinaviansourceapparentlyclosetoEriksen.Concludewithaquoteorcalltoaction.Iftherearenosubstitutionparameters,enteronlyonequote.Wehaveaskforquote...
- 6446
- 问题详情:若(x-1)0=1则 ( ) A.x≥1 B.x≤1 C.x≠1 D.x≠0【回答】C知识点:分式的运算题型:选择题...
- 20758
- 问题详情:如图表示果蝇(2N=8)体内细胞在*过程中某比值H(H=染*体数/核DNA含量)QUOTE的变化曲线,F时细胞*刚好结束.下列相关叙述中错误的是()A.EF段细胞内可能有8对同源染*体B.基因的分离和自由组合可发生在CD段C.BC段细胞内发生需要模板的半保留复制D.CD段时,H与染*体数/DNA含量QUOTE的...
- 27536
- 1、Tocreateanactualapostrophe,puttwosinglequotemarksside-by-side(")toproduceonequotemarkinyouroutput."2、Sometimesallittakesisafresh,restedpairofeyestospotamissingsemi-colon,oranextraquotemark,ortorealizethatthesolutionismuchsimplerthanyouoriginall...
- 17329
- ToquotefromclassicscanonsThisisaquotefromtheBible.Letmequotefromoneofyourdocuments.Ineedaquotefromeachofyouforthenewspaperarticle.There'sawonderfulquotefromJohnWatsonandinthisquotejohnWatsonisparaphrasingafamousboastbytheJesuits.AnotherquotefromOsho...
- 16220
- 问题详情:先观察:1﹣=×,1﹣=×,1﹣=×,…(1)探究规律填空:1﹣=×;(2)计算:(1﹣)•(1﹣)•(1﹣)…(1﹣)【回答】【考点】有理数的混合运算.【分析】(1)利用平方差公式变形即可得到结果;(2)原式利用平方差公式化简,计算即可得到结果.【解答】解:(1)原式=×;(2)原式=(1﹣)(1+)(1﹣)(1+)…(1﹣)(1+)=××××…××=,故*为:(1);知识点:有理数的乘方题型:...
- 16758
- Iprefer"career,"withscarequotes,althoughonemightalsocallitapart-timejobwithopportunitiesforadvancement.Containsawordorphraseforwhichtheauthorornarratorindicatesadisclaimingofresponsibility,forexamplebytheuseofscarequotesoritalics.Youmighthavenotice...
- 11256
- 问题详情:(22+1)(24+1)(28+1)(216+1)+1=.【回答】232.【考点】平方差公式.【专题】计算题.【分析】原式乘以(2﹣1)后,利用平方差公式依次计算,合并即可得到结果.【解答】解:原式=(2﹣1)(2+1)(22+1)(24+1)(28+1)(216+1)+1=(22﹣1)(22+1)(24+1)(28+1)(216+1)+1=(24﹣1)(24+1)(28+1)(216+1)+1=(28﹣1)(28+1)(216+1)+1=(216﹣1)(216+1)+1=232﹣1+1=232.故...
- 19166
- Tocreateanactualapostrophe,puttwosinglequotemarksside-by-side(")toproduceonequotemarkinyouroutput."Inordertoenterasinglequoteintoatextliteralsurroundedbysinglequotes,oradoublequoteintoaliteralsurroundedbydoublequotes,prefixitwithabackslashcharacter...
- 10204
- 问题详情:(﹣1)+(+1)+(﹣2)﹣(﹣3)﹣(+1).【回答】原式=﹣1﹣2+1+3﹣1=﹣.知识点:有理数的加减法题型:计算题...
- 18004
- Sincereprintrateindicatesthefameandthenumberofreadersofthescientificpapersprintedintheperiodicalsandquoterateindicatestheacademicinfluenceofthem.InsuranceBrokerswillquoteratesforalltypesofcargoandrisks....
- 21288
- 问题详情:计算: +()﹣1﹣(+1)(﹣1)【回答】【考点】二次根式的混合运算;负整数指数幂.【专题】计算题.【分析】原式第一项化为最简二次根式,第二项利用负指数公式化简,第三项利用平方差公式化简,合并后即可得到结果.【解答】解: +()﹣1﹣(+1)(﹣1)=2+4﹣(5﹣1)=2+4﹣4=2.【点评】此题考查了二次根式的混合运算,涉及...
- 30951
- 问题详情:计算:(1-)(1-)(1-)……(1-)(1-).【回答】原式=(1-)(1+)(1-)(1+)(1-)(1+)……(1-)(1+)(1-)(1+)=×××……××=×=.知识点:乘法公式题型:计算题...
- 30891
- Wehaveaskforquoteforrefitthebar.Wehaveaskedforquoteforrefittingthebar.Theirquoteforthejobwaswaytoohigh.Howmuchdoyouquoteforthisbrandoftie?Forexample,apricequotefor10,000ThinkPadlaptopsmayonlybevalidfor10daysafterthequotewasreceived.Atwhatlowestpricec...
- 21628
- 问题详情:观察下列各式(x-1)(x+1)=x2-1(x-1)(x2+x+1)=x3-1(x-1)(x3+x2+x+1)=x4-1…①根据以上规律,则(x-1)(x6+x5+x4+x3+x2+x+1)=______.②你能否由此归纳出一般*规律:(x-1)(xn+xn-1+…+x+1)=______.③根据②求出:1+2+22+…+234+235的结果.【回答】(1)x7-1;(2)xn+1-1;(3)236-1.【解析】①观察已知各式,得到一...
- 23441
- 问题详情: (+1)(-1)-+()-1;【回答】解:原式=3-1-4+2=0.知识点:二次根式的乘除题型:计算题...
- 5104
- 问题详情:计算:(1﹣)×(1﹣)×(1﹣)×(1﹣)×…×(1﹣)×(1﹣)【回答】解:原式=××××…××=.知识点:有理数的乘除法题型:解答题...
- 12347
- 问题详情:.计算(﹣1)1+(﹣1)2+…+(﹣1)2000=. ...
- 21249
- ExceptasauthorizedbytheCompany,theDistributorshallnotquotepricetoanycustomersoutsidetheterritory.Wewanttobuyamanganeseoxidewith62%PLSsendusyourspecandyourquotepriceFOB.Whenweinvoicecustomers,weusuallyquotepricesf.o.b.Guangzhou.Pleasenotethatwearelook...
- 10433
- 问题详情:.阅读材料,回答问题.(1+)×(1-)=×=1;(1+)×(1+)×(1-)×(1-)=×××=(×)×(×)=1×1=1.根据以上信息,计算:(1+)×(1+)×(1+)×…×(1+)×(1-)×(1-)×(1-)×…×(1-).【回答】解:(1+)×(1+)×(1+)×…×(1+)×(1-)×(1-)×(1-)×…×(1-)=×××…×××××…×=(×)×(×)×(×)×…×(×)=1.知识点:...
- 7788