2023年高考数学大招12错位相减大招

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.6189:.=(kn+,ᑣS„=(An+B)qn-B.ᐸ:A=_L,B=3ᡈ8=-^--------J.q-iq-i4-i(qf6289:a„={an+h)qnᑣS„=[—+---------j].qn+'-\—----------.[q-1q-\(q-l)?>[q-1(4-1@>"AB.62C6D!E.᝞GH⚗J%=(h?+b)/iᡈ%=(a஻+/7)q",NOPH⚗ᓄR.S"᪗UV$.ᨵX&YZ[S᪵()ᑏ+ᫀ,ὃᑖᔩ?Xb◤⌕ᑏ“fgh”!jkᑖ.lm“fgh"op!gᑏS”Ḅ⊤r$psgᑏq.S”Ḅ⊤r$ptgᑏ(1-4)£Ḅ⊤r$pfgᑏ:u᦮ᳮ*S”ḄG.S᪵ᑏx᪗U+ᫀ!y!᪵zjkᑖ{ᙠ|}~aḄn⚗5,,.n9:=(kn+b)q"T,p!g8S”=(+஺)᜛°+(2Z+h)q+(3k+h)q2++(kn+b)qn-',psg8gS“=^k+b)q+(2k+b)q2++[(஻—I)A+b^qn~x+(kn+b)q",psg8(l-q)S“=(k+b)+kq+kq?+kqy++kqn~'~[kn+b'jq",pfg:u᦮ᳮ*S“=(A”+8)./-B.ᐜ'~5⍝⚪!~#$.189:ᦪᑡH⚗=(2஻+3)3"S”.:()ᑭᵨ#$.5„=|'—+—---------^-lx3n+,-|'—--------^-1x33-13-1(3-1)23-1(3-1)2

1=(n+l)3n+l-3$fghᓽ&.2:9:ᦪᑡH⚗a=(2஻+3)3ᔣ,S,.n:ᐜV.᪗UV$.=(6஻+9)3",()ᑭᵨ#$.6n96x3w+,96S"=----------1--------------------------x33-13-1(3-1)23-1(3-1)23஻+Ux96x32-424=(n+l)3n+2-93:9:ᦪᑡH⚗=(2”-3)3"T,.:ᐜV.᪗UV$a,,☢&'ᵨᜧ#$.223!13x3(3-I)23-1(3-I)2/n11x3஻+ix33-2-6~2~6=("2)3"+24:9:ᦪᑡH⚗.=S”.:ᐜV.᪗UV$.=(2஻+3)GJ,◀.ᓽ&.5(9:ᦪᑡH⚗/=*S”.:ᐜV.᪗UV$4==(஻+£|(£|”,()ᵨᜧᓽ&.

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Ḅ஻⚗.²³:7¯´.পq,3a2,9%ᡂ01ᦪᑡ,µ¶Ḅ=6+9%,®·©✌⚗.1Ḅ02ᦪ¸¹§ᐸ#2.º»lj6q=l+9q2,.q=g,.”(2)²³:61:ᵫপ:=(¯µ,"=஻=+24)+…+஻]3,জ¾¿À+2x0+…ঝ1-জ-ঝ/0|^40-஻00sF஻2

36280==("+0)])AnBAᵨ┯
Ḅᜧs“=-----1------------------[q-lq-\(᜛-1ᔆn0*ᑮ:Ç-------1---------1I11----1----133ᒕ~61¡2.(5ᑖ)(2021•ËὃI)Ì᪥XᙠẆÏÐÑÒÓÔÕÖ×ÒÕuØZÙÒḄÌᩩÛÜÝÞÒÛᢚ.à.20dmxl2dmḄá6VÒÛᢚ1âᐳ&'*ᑮlOdmxl2dm,20dmx6dmäåàḄæVçèḄ☢é¿$=240dn?,Ûᢚ2âᐳ&'*ᑮ5dmxl2dm,10dmx6dm,20dmx3dmtåàḄæVçèḄ☢é¿S?=180dm2,'ëì|•ᑣÛᢚ4âᐳ&'*ᑮJàæVḄåᦪ.;᝞GÛᢚ஻âîm&=--------------dm2:618᧕:ᨵ20dmx3dm,10dmx3dm,5dmx3dm,9dmx6dmdmxl2dmï5åà;4224ᵫ⚪&:Ûᢚkâᐳᨵk+1åàð☢é.ᦑS,=24஺$+1),ᑣZ3&=240Z£ô°T“=ôᑣ/=¿õTQ஻+3=3--—,C=240(3!öᦑ+ᫀ.85;240(3-÷620=ø”°7¯,=ZùᧇᐸH⚗.=("+1)•(})”=("+1)”

4AnBA],(BAஹᵨ┯
Ḅᜧs“=EH஺*ᑮ:In2(-2n-6)2"ᨬÿᑮ:3.(2020•᪗/)1Ḅᦪᑡ0M3Ḅ⚗.2প4
Ḅ(2)«,=1"ᦪᑡ஻""Ḅ%”⚗'.(:)*1+প4
41Ḅᦪᑡ"q᜜"஺3Ḅ⚗".2al=a+%"ᓽ2al=aq+aq2,2tᓽq2+«-2=0,(q=-2(l23)"ᡠ5%Ḅ62(2)q=1,ᑣa=(-2)n-',na=n.(-28,nnᑣᦪᑡ9,Ḅ%”⚗'S“=11+2.(-2)+3.(-2-++«-(-2)"-',-2S=1-(-2)+2-(-2)2+3-(-2)3++”•(-2)",n:;<=.3s=1+(-2)+(-2-+(-2)3++(6286".(-2)"=?-«.(-2)”,liᓄA.Sn=I1+37.(-2)""ᡠ5ᦪᑡ“4
Ḅ%”⚗'1I+37(-2)”)*2+ᐜᓄᡂ᪗J;:9=KL11Q+_9----------202MNᑭᵨ;+5“=•(62S-•(-2)-2-1-2-1(-2-1)2-2-1(-2-1)2

5l-(l+3n)-(-2)n᦮ᳮ:S“=94.(2020,᪗III)ᦪᑡ%VWq=3,a.+i=3a„-4n.পXYZ%,[\2
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Ḅ%஻⚗'5„=3x2'+5X22++(2«+1)2",…জ:stu2,25.=3x2?+5x23++(2”+1)2Ḅ"…ঝজ-ঝ,-S“=3x2+2x22++2x2w-(2n+l)2,,+1=6+-(2n+1)2,,+,,ᡠ5S“=(2஻-l)2"i+2.)*2:পᦪᑡ஻“VWq=3,a“+]=3a“-4஻,ᑣ%=3a,-4=5,a=3a-4x2=7,324x1+cr(n+l)+/?=3(«„+an+J3),.஺“+i=3%+2c஻+2/-a,y"(p[2p-a=0[p=-l...a”+]-2(஻+1)-1=3(%-2n-l),%=3,q-2x1-1=0,^za—2(1+1)-1=0,ᡠ5஻஻=2஻+lឤᡂi.ᡠ5஻஻=2஻+1.2ফᑭᵨ;:s“=[|+ᓰ~yᓰ~᦮ᳮ+5“=(2஻-1)2ᔣ+2

65.ᦪᑡc=(2n-l)-,ᐸ%n⚗Ḅ'S„.n(:)*1+5„=1-2°+3.2'+5-22++(2஻-l)-2"T,জ25„=1-2'+3-22+5-23++(2"-1>2”,ঝঝ-জS„=-2°-2-2'-2-22--2-2n~'+(2n-l)-20=-1-22-23-24-.-2fl+(2M-1)-2"=(2n-3)-2n+3.)*2:ᐜ᪗J;c“=(2”_1).2“T=•2”,■2n+1+3=(2n-3)-2"+3ᢥ᯿“”ᑏ"ᓽ.6.(2016•ᳮ)nᦪᑡ4Ḅ%"⚗'5“=3"2+8஻,“ᦪᑮJ,za„=b+b.nn+lপᦪᑡ¢Ḅ]⚗;ফqc„=(""+yᦪᑡ%Ḅ%஻⚗'T.n(4+2)(+(1)ᵫ⚪¤ne¥.2f,¦=5“-51=6§+5,e§=1f,a=S]=11"ᡠ5a=6஻+5.xnᦪᑡᒾḄ«ᵫ¬'ᓽ®¯*.(£ᡠ5²஻+L(2))*1:ᵫ(1)n%=জ´µ?■=3(஻+l)-2"+l·7=q+C2+C2++%,(3஻+3)^#7,=3X[2X22+3X23+4X24++(»+1)X2,,+1],

72T„=3X[2X23+3X24+4X25+T(஻+1)X2"+2],:;¼"-7,=3X[2X22+23+24++2,,+I-(n+l)x2,,+2]=3x4+4QT)_(“+I)X2"+22-117=-3n-2n+2ᡠ57=3஻.2"+2.)*2:c“=3(஻+1).2ᔣ=(6஻+6).2",S„=(6n+6-6)-2n+l-(6-6)-2=3n-2"+2.7.(2015•½¾ᦻ)nᦪᑡ%'bVW"n4=24=U„,=24(“CN*)M++»,,=%+পa“ÀÁফÂᦪᑡ஺eḄ%஻⚗'T„"T„.(:)*1:পᵫq=2,a"+|=2a“&'a”=2".e஻=1f"Ã=3-1"ᦑᓃ2=2e஻..2f,\=h-b"᦮ᳮÅL=Si,ᡠ5b„=nn+lnnbnnফᵫপn,a“"="-2"ᡠ57=2+2᱇+323++n-2"27,=22+2-23+2•24++(n-l)-2"+M-2"+1ᡠ57=(஻-1)2"+I+2)*2:q/“=(n+0)-2n5„=(H+0-1)-2,,+1-(O-l)-2=(n-))-2,,+I+28.(2021Ç•ÈaÉ᪥ËÌ)nᦪᑡ%Ḅ%஻⚗'S“']⚗a”"zÍ="2%+1+”“+|=2,ᙠᦪᑡ%"Ï=1=,/-=j+4("eN*).পᦪᑡ{4},{2}Ḅ]⚗;;

877(2)ᦪÒu¬VWc*a`:e.2f-q++Q++C"<-64(:)*1:(1)e஻=1f,2s2+w=2,ᓽ26+3%=2"ᡠ5஻2=qᵫ2s“+|+4+|=2,S“+]=l-g/+]e஻..2f,"=1-3^"Ùf4+i=S“+i-5“=(1-/+J-11-%)=-஺“+|+a,-,ᓽ3"“+|=a,,+,a=-,:.a>0,/.e”..2f"4ᔢ=12n3a3nÜ.ݯÜ⚗Þ"gḄᦪᑡ"Ùf%=n1面21厂+得1占l%一=冬一一r2〃仿2〃J+ßàÃ=1=Lᡠ5á=I0T-67=1"2bஹbh2ᦪᑡ(Qâ✌⚗1,1Ḅᦪᑡ,.•ä=஻"ᓽä.3J2n(2)`a:e§.2f,g="7=(?2++c,nᑣ“$3$…+æT32T2-T=çF6஻xtJ3"33êᑗ,2஻+3(1ì524N•"<îCn>0,.,.7^..7^=—

97125517—=----F—=C[+4,,G+S4~Co+••+c„V—+G=—J—=662341424ᓽe¥.2f"C]+C?+03++"஻<(,)*2Z=q++-Q+ñò⚗óô.5ᵨ;Ḅ=(3஻+0)ᵨ3/70210__29n_2755T,=------—T-T+—<—_2_24?6444~3~39>-39>ᒕdḄt)*19.(2021᧡•ᜩᐗÉ᪥Ëᨴὃ)⌴ḄᦪᑡḄ஻⚗5“,§2=6,S4=30পᦪᑡ%Ḅ⚗.ফ"b=a,Jog13)ᦪᑡ2Ḅ஻⚗T)7++-2஻+i>50ᡂ1Ḅᨬ34᦮ᦪ஻Ḅ6.ntl2%(1-9---------------=644::প$2=6,54=30,==1+/?…ஹBC◀EFG=1+/=5,ᦪᑡa⌴,q>0,♦q=2,%=2,/.a=2-2Z=2஻nn(2)b=ajoga=-p-2+2-22++஻.2஻)n1/12^//„=l-2+2-22++n-2n,2//„=l-22+2-23++(n-l)-2"+n-2,,+1,BCREF)2(1-2")-//„=2+22+23++2"-n-2n+l=-----^-n-2"+l=2n+l(1-«)-2=7+,1—2T+n-2n+'>50,.-.(l-w)-2,,+1-2+n-2,,+l>50,/.2n+l>52nᨬ34᦮ᦪ”Ḅ65WX2Yd=(-஻+0ு2",\]ᵨ7+=(-/J+0+I)-2,,+1-(O+l)-2=(l-n)-2,,+1-2ᒕbḄcWX1

10dLf2021g•ḇjk᪥mnopᙠᦪᑡrs)4=4,஻⚗S“.tuS”=a,M+n.পwYx஻..2y,ᦪᑡ4-1ᦪᑡ)z⚗ফ{=|I'ᦪᑡ{2}Ḅ஻⚗ᓅ.:WX1:পwY஻=l,q=4.x.2y)a=S-S_=a+஻%-஻+1,nnn}n+]••.%-1=2(஺ᔆ1),)5=2,ᑣq-1=2"ஹF4=2"--,.•.%=[Y7:a-12+1,.2nফ:Yx஻=1y)=1■.x.2y)2=஻.4].•.x=1y,7]gx*2y,7>”+3++௃{M=26)+3({|++஻](!)34+3+,+)13I3918-r,11I111flY._13(2n+3}1T31213"ᑓ2'12I4J3"஻=1y)7+r〉ᔠ£.=¤-¥°eN*"1243"ஹWX2:ª=«R]¬X\]ᵨ)◤⌕¯⚗)Ꮇ±ᦪᑡ²³⚗1´1µ¶Tn=1++...+b=-+Z?+...+஻,+1§n2

11ஹஹn0__J_0_LJ.2^293^32a-3+33-3>39j13132n+31+12-12~3"d2.f2021g•¸¹nopº»4¼½ᦪᑡ)ᐸ஻⚗S,”d¼ᦪᑡ,4=a=2,a+b=27,S—Z?=10A444f1pᦪᑡ4¿rḄ⚗+ফÀ7+=஺Á+a”M+.+q4,஻eN”,7+.:fD±½ᦪᑡ4Ḅ½d,ᦪᑡ஻Ḅq,ᵫq=4=2,F»=2+3",“=Iq,S=8+6J,42+34+2/=27_d=3ᵫᩩÅFWÆÇ8+64-2/=10=,ᦑa”=3n-l,bn=T(,«GN");4=2')ফWX1Y7+=<+a„_,b+a„_b++᝛223=2"4+2"-4++2a“=2"q+ËÌa="=Í3-r?=%3஻+2f{%pᡠÏ2஻-12'i2"-22"TN2n~2T“=2,,[(C-C)+(C-C)++(C„-C„)]=2"(G+%J=10•2"—2(3”+5)+1223+1WX2:1=abl+a_b+a_b++ar,=2"a,+2"~'a++2a11n}2n232n2”,+,+ᑶ){Ñ=4+ÒÒ+ᑶ)ᒺ,=+Ô+Ò+Õ+3+2,2""2"\BCRFᑮY;M,=+3”1+,--2-,-1-rJ

12c3«-1.<3«+5=2--------------FJ-------------------=3--------------2"[12"1-----2ᡠÏM“=1-×Ø)ᡠÏ7+=2"•M,=1°஺2"-2f3஻+5.WX3Y4=a=i+a_,h+++஺22T+>n2ᓽ7+=23஻-1+2?f3஻—4+23f3஻—7p+.«-'.5+2"-2,+2ᑣ27+=22f3n-l+23f3n-4p+24f3n-7p++2"-5+2,,+,-2,BCRFᑮYf,=—23஻1+3f2?+23++2H+2,,+I-24_7M+I=-2f3«-l+3x2-^+2n+1x2=5-2n+l-6H-10=10-2n-2f3n+5p.WX4:7+=2f3஻-l+22f3஻-4p+23f3஻-7p++2"+5+2"-2=2"[q+£•++d)c.=47=f3஻-1)Ú=f6஻-2p.!)5Ḅ஻⚗Ñg1T'22~24?1~24J=-ফ-20.Û+1஺=10f3஻+5>ÛᡠÏ<=2"Ü=10-2"-2f3஻+5p.4ᡃ671.º»½ᦪᑡq
tu஺2=஺)஺6+஺8=-10(1)ᦪᑡḄ⚗+(2)ᦪᑡÝ|Ḅ஻⚗.

13:᪆Y(1)±½ᦪᑡa,JḄ½)ᵫº»ᩩÅEFß^++12^--1()):Fß:?1'ᦑᦪᑡ4
Ḅ⚗஺“=2-஻.ফ±ᦪᑡ1ᑶ)Ḅ஻⚗S“)ᓽ”+à+ᦑSáâã+*++äᡠÏx஻1y,2-n~2^~=åᡠÏSn=Wæ£)ᦪᑡᑶ)Ḅ஻X2:2—஻/.\1A4=^ir=(_2஻+4)..,S“=T-21ç10)Xè°?2.±ᦪᑡtu4=2,%-4=3"M.(1)ᦪᑡ4
Ḅ⚗+(2){b=na,ᦪᑡ2
Ḅ஻⚗S,,.nn:᪆Yপᵫº»,x஻..1y)a,,\=[(4+i-6,)+(4-4-1)++(44)]+4-=3(22'1+2)++++2=3X2^1_4^+2=22n+1.1-4ᡠÏᦪᑡ«„Ḅ⚗ফᵫb=na=n-^n-',»S„=1.2+2-23+3-25+...+n-22n-',nn²é)22S„=l-23+2-25+3-25++n-22,,+|,(2)(1)-(2),(1-22)S„=2+23+25++22"-1-n-22n+1,/.S=-[(3n-l)22fl+1+21.n9

14fl1ஹ(1>ftQ-nX2Yd=஻22"T=2-4"(ᐜᓄ᪗í).S=x4,,+|--2x4=33(3)23(3)2\?\7^4"+12+—618)93.º»ᦪᑡq
Ḅ஻⚗S“)ᨵq=2,3S“=5%-4%_1+35„_,(n..2).(1)ᦪᑡ4
Ḅ⚗+ফDb“=஻.a)ᦪᑡïḄ஻⚗3n:᪆Y(1)3s“-3S,i=5Ô,4Ô|(஻..2),)4=2<*,j=2,Ë-a,^2,:.{a}¼Ïnan-\2✌⚗,2Ḅᦪᑡ).,.a“=2-2"T=2".(2)b=n-2n,T=1-2'+2-22+3-23++n-2",27+,=l-22+2-23+.+(«-l)-2,,+n-nn2ÜBCRFY1=2'+22++2"-n-2,,+1,_ñ=202=(1—஻>2"+1—2,?7+=2+(஻-1>2ᵨ.1—2X2Y2=஻.2”,S,,x2"'Ýòx2=(n-l)2n+l+24.ᦪᑡqjḄ”⚗S“)º»5„5,Sᡂ½ᦪᑡ.32পÜḄq+(2)"4ó=,ᦪôUõ•஻“Ḅn⚗T.n:᪆Y(1)ᵫº»F2s3=ὡ+S2).2(q+÷+/)=4+(4+%),ø+2%=0,qw0,.l+%=0ফ

15=2++++প-ফF1^-H)H)H)0-J-25.(2021•ùᐵû)º»ᦪᑡqḄ஻⚗S“)"S“=-n2+kn(kwN*),S“Ḅᨬᜧ625.(D᝕Ḅ6þ⚗ø+ফᦪᑡ"஽“EḄ஻⚗᪆প5“="+=]஻-5+9kᏔᦪn=|S”Ḅᨬᜧ!]rk2kk+]T1ᑣW=25,᝕=1஺ᡂ+,-k᜻ᦪᑣn=-^~ᡈ;S஻<^_iA2k-\,Ḅᨬᜧ!--+k--=25,789:᦮ᦪ.ᡠ>S=-n2+l0nnq=S[=9,n..2a=S-S_=-n2+10n+(//-l)2-10(n-1)=112/?,HInnnlJ஻=1Kᡂ+ᦑ<7„=H-2n,neN;

16ফ8S1:஻-2…=T”VᑣT123771Tl23n+Yᡭ[I\]ᓅXY+Y++Y7=LY+7+1^3r,l1+...+01--^ߟn^ߟ44"n744+3஻ᓄ4஻4n+1rn`’1----477I8S2-.n-2a"-'1=n-2஻=2=5+0z.bcᓄᡂ᪗eIf,4"ஹ4ভ99946.(2021•jklm)nop%rsᦪᑡKruᦪᑡKḄ஻⚗5“v4=b\=l,a=%—%=S3+42(1)wᦪᑡq
,K,Ḅx⚗yI,(2)zc„=ab,Tᦪᑡp%Ḅ஻⚗w7,.nnn᪆পzrsᦪᑡ4
Ḅysd,ruᦪᑡ2
Ḅyuq,ᵫ1+6?=1+2d—C[~d=4«,=&!=\,a=03-b,a=S+b,ᓽ«,\,\ᡈ23332U=21+2d=1+4+q~+qcfIJa,,=l+4c஻-1=4஻-3,2=2"T,c7=ফ8S1:c=a-b=c4n-3f-2n-1,7,,=1•2°+5•21+9-22++c4n-3f-2,-1,27,=1-2+5nnn-22+9-23++(4«-3)-2",[I\]

1721-2"-T=1+4c2'+22++2'i—c4஻—3>2"=1+4^—43f•2",ᓄ,n7,=7+c4n-7f-2n.i8S2:3
3ஹ%K=c4஻—3f.2"T=c2஻_j.2",7,In22x2=1111127\77ஹ2n--x2""+7=7+c4஻7>2”.2>7.2021•lmfzᦪᑡ4
4=-q=23'T.1wᦪᑡ4
Ḅx⚗yI;ফ2=2n+la„,wᦪᑡp“Ḅ஻⚗S,,.᪆8S1প4=14ᔣ-q=2-3"a“=q+a,_q+q_ti,++
a“_a,1=]+2+6++2-3"-2=]+2c1-3HIJ஻=[Kᡂ+ᡠ>=3"T,஻eN,,1-3ফZ?„=c2n+l«„=c2n+l-3z'_1,S„=3-3°+5-3l+7-32++c2n-l-3,,-2+c2n+l-3,,_|,3S„=3-3+5-32+7-33++c2rt-l-3n-|+c2n+l-3n,[I\]-2S,,=3+2c3'+32++3"-2+3'1—2+1•3"=3+2f2஻+1•3",ᑣS“=஻-3”.\218S2:b“=c2஻+l-3"T—n+—•3"ᓄᡂ᪗eIf337

18
212ஹfl2ஹ—fl——1+3x3,,+l-33x3=]஻3"|=3".2222222\7\78.2021᧡•ᨴὃfno✌⚗4Ḅᦪᑡp%Ḅ஻⚗S“vS஻+1__S.1+2c%+2஻+i331w:ᦪᑡcfrsᦪIJ,wᦪᑡq
Ḅx⚗yI;ফ-2=5wᦪᑡKḄ“⚗T.n᪆পᵫL=S“+24+2"+I£^_&=¥^+2ᔣᓽ33333஺+1=24+3.2"+1•.¦§=3,ᓽᦪᑡ¨>3=2✌⚗>3ysḄ21rsᦪᑡ4=2+3஻-1=3஻-1,ᑣa„=c3»-l-2n;ফS1Z,=c3n+2f-2,,+1,.-.7,=5-22+8-23+ll-24++c3஻—1>2"+c3஻+2ு7fc=

194ு0,஺,+2஺“=4S”+3;ᦪᑡ¸ᔜ⚗ºḄruᦪᑡ»="v᝞½,2%ᡂrsᦪᑡ.পwᦪᑡ¾½Ḅx⚗yI,ফ-c“=a=”,஻GN”,T"ᦪᑡg
Ḅ"⚗,wT”.᪆c1S,,ᦪᑡ4
Ḅn⚗noa஻ுcf,a,+2a“=4S"+31,஻=1q=3ᡈ—1c¿!f஻..2a3+2a,i=4S,i+3c2f,প-ফc4+4+1fc4ᵨ஺“f=2c஺,ᵪ+4,ᦑ4ᵨ=2cÂᦪfᡠ>ᦪᑡp«„¨>3✌⚗2ysḄrsᦪᑡ,ᡠ>q=2஻+l஻eN*.zyuqḄᦪᑡpᒹᔜ⚗º8b3=.+2b2v஽,4a,2b,ᡂrsᦪᑡ.ᡠ>Å=஻+2",ᡠ>^,q=8'I"0;ᡈ-;c¿!f,ᦑa=".Æ=u=ÇZ4IS\Z.JZফS1:ᵫপq,=a/“=c2஻+1•Èᡠ>Tn=3X^+5X1+7Xp-++2"+1,Èপ.=3X[+5X*+7X[++c2n+1—2f,প-ফixfi-nJ=l+2xl+g+,++`-c2஻+l./=l+2x--------p-----c2஻+1É1-2ᦑᓅ=10—c2஻+5f•È”eN*.8S2:c„=a„b=c2n+l-^-=c4/1+2f—cᓄᡂ᪗eIfn

20ஹ2=(—8஻-20)x5+10=10-(2஻+5>Ḅ.T-210.(2021Í•ᓭÏ´᪥¶ÐÑ)noᦪᑡp4Ḅ“⚗S”vS.=,/+|஻_i.(1)wᦪᑡp4Ḅx⚗yI,ফ-b=a„-2",wᦪᑡ¸Ḅ஻⚗T.nn13᪆পS„=-n2+|n-l,”=1a,=5,=1;«..2131=14,=5“_5“_1=Ó஻0-+Ó஻_]_Ó(஻-1);(஻_1)+1=஻+LᑣÔ=p,2222[஻+1,Õ.22,஻=1ফ8S1K=""=11)242,஻=17,=஽=2;21=4+3x23+4x2*++(஻+1)2ᵨ\ᡄ-7,,=10+23+24++2"_(஻+1>2ᵪ=1()+)1+ᓄT=n-2',+'-2.(n..2),HIJ஻=1Kᡂ+ØHT=n-2n+'-2nn2,w=18S2ibn=an-2"=-(஻+)2"Ú2’ÛÜÝÞ⚗ᜐᳮ7,=2+3x2?+4x23++(n+l)-2n=2x2+3x22+4x23++(“+1)2—2x2+2=2x2+3x22+4x23+.+(n+l)-2,--2,☢â>┯ä\]11ஹ+x2----x2—2=n-2,,+,-2.TFF"112J

2111.(2021Í♦æç´᪥¶Ðè)noS,¨ᦪᑡp4Ḅ"⚗S„=3S„+l,a=1.+l1পᦪᑡp%¨ruᦪᑡwéḄx⚗yI,ফ-h=(-1ê•na,wᦪᑡKḄ஻⚗T.nnn᪆পᵫS,ë=3S“+1,n..2S“=3s,i+l,[I\]4+]=3a"(.2),n—1S=3S,+1ᓽ2q+¸=3q+1,4=3,஺2íᨵ«„,=3a„,.-.ᦪᑡp4¨✌⚗1,+yu3Ḅruᦪᑡ.•ï,=3ð(2)Sl,b=(-1)"-'=n-i-3rl,.-.T=1+2-(-3)'+3-(-3)2++(«-1).(-3)0-2nn+n-(ߟ3)"T,—37,=1-(-3)'+2.(-3)2++(«-1)•(-3)n-'+n•(ߟ3)”,[I\]47,=1+(-3)1+(-3)2+.+(-3)"-'-n(-3)n,47,,=-2-n(3)",.”,C1ஹ”oóS2ô=(l)i♦õ,=஻•(—3)i=-Ó஻♦(3)",7,=-2-+27-—^TX(-3)"+,--4-4(-4)12.(2021Í•ö÷´᪥¶ᨴὃ)noᦪᑡp4Ḅ”⚗S”,v2S“=3%-3.(1)wᦪᑡp4Ḅx⚗yI,ফza=210g3஺,+(-1)"-n,wᦪᑡKḄ஻⚗(.᪆(1)”=12sl=2%=3q—3,ᡠ>q=3,»..2ú2S.=34-3,ᡠ>2s=3a,i-3,[I¬s=S-S_=3஺,-,ᓽ2=3,nnta,zú4=3,ᡠ>ᦪᑡp4,¨✌⚗3,yu3Ḅruᦪᑡᦑ4=3",஻GN*,(2)b=21oga„+(-1)"-n=2n+(-l)n-n,nᏔᦪ,n⚗n3

22T,1=2•ߟ\—-+(—1)+2+(—3)+4++(—++=஻2+ᑶ;>n?᜻ᦪB0Cn⚗E=7,_1+2஻F஻=G+H,஻ḄᏔᦪ23+஻="+—ü(`2(M-1)+-(/?-1)஻2+K1,஻ᯠM᜻ᦪ2N2:O=2஻+஻(-1)”(ᑖQRE)0Sc“=2஻,S“=஻(஻+l),Sd=«(-1)",TᐸCnn⚗E?R,R„=n(n011,,+101)nWXF1Y_,W+R,,----1-------------7x(-l)x(-l)=--2-2(-2)2Jஹஹ-2(-2)2J24=n(n+I)-V4CD”t+l74'

23