2022-2023学年湖南省怀化市中考数学专项突破仿真模拟试题（一模二模）含解析

《2022-2023学年湖南省怀化市中考数学专项突破仿真模拟试题（一模二模）含解析》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

2022-2023
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ᵨ┯ḄA.(a+b)(,a-b)=a2-b2B.(2x+l)(2x-1)=2x2-1C.(x+1)(X-1)=X2-1D.(-3x+2)(-3x-2)=9x2-42.M(3x-y2)=/-9x2,ᑣ⚗M()A.-(3x+y2)B.-y2+3xC.3x+y2D.3x-y23.ᱥy=2x2+2ᔣ1ᓫ!"ᡠ$ᱥḄ%᪆A.y=2x2+3B.y=2x2+lC.y=2(x+1)2+2D.y=2(x-1)2+24.'()*+,ᦪḄ./01-2,1,ᑣ2,ᦪḄ./!3A.ஹ5/▲B.78ஹ5/▲C.78ஹ9/▲D.75ஹ9/▲5.:ᑡ.;<=>?@.;A?@.;Ḅᨵ7.C᪷E9mḄFᩚᙠIᙢ4mEᜐᢚMᢚMᜐNOPQRᙠ3.9mSᜐTḄUE1mḄVWA,Xᨵᓻ◅B.ᨵᓻ◅C.[\ᨵᓻ◅D.]^ᑨM8.`abcᩭef“hiᢄk”Ḅᡊᶍ᪀pqᕡḼtf⌕vkw11700000xᦪy1170000071⚓/|53⚓

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52022-2023
ᓭḕᝰᓄὃᦪ⚗ẚ⚪()ஹ⌱⌱(⚪4ᑖᐳ40ᑖ)ᑡᔜ⚪ᙳᨵ$%&ᫀᐸ)ᨵ%*+,Ḅ./+,Ḅ&ᫀḄ012ᐭ⚪4Ḅ51ᑁ.1.ᑡᵨ$┯Ḅ*()A.(a+b)(a-b)=a2-b2B.(2x+l)(2x-1)=2x2-1C.(x+1)(x-1)=/-1D.(-3x+2)(-3x-2)=9x2-4ூᫀ௃Bூ௃(2r+l)(2x-1)=(2^)2-1=4x2-1,ᦑBᵨ$┯.ᦑ⌱3B.2.M(3x-y2)=/-9x2,ᑣ%⚗$M()A.-(3x+y2)B.-y2+3xC,3x+y2D.3x-y2ூᫀ௃Aூ௃ᑖ᪆3¡$¢IḄ%⚗$ᑖ£$93M-(3x-y2)=(y2+3x)(y2-3x)=-(y2+3x)(y2-3x),ᵫ¤ᓽ9%⚗$MḄ⊤}$.3VM-(3x-y2)=y4-9x2=(y2+3x)(y2-3x)=-(y2+3x)(y2-3x)>M=-(y2+3x).ᦑ⌱A.F¦3”¨©¡$Ḅ¢Iᑖ£$ᓄ3-(y2+3x)(y2-3x)”*¬⚪Ḅᐵ®.3.pᱥqy=2x2+2ᔣ¢°1±ᓫ³´ᡠ9pᱥqḄ᪆$*()A.y=2x2+3B.y=2x2+lC.y=2(x+1)2+2D.y=2(x-1)2+2ூᫀ௃Dூ௃⚪ᑖ᪆3pᱥqy=2x?+2Ḅ⚔Fᙶ᪗(0,2),W6⚓/Z53⚓

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11ூEFGᫀ௃y=-x+2ூ௃⚪᪆Èx=-2qᐭkx+b=OP-2k+b=0,È(0,2)qᐭy=kx+bPb=2,ᡠ¢-2k+2=0,Pk=l,ᡠ¢°ᦪ᪆Ry=x+2.18.᝞UZ1=Z2,⌕(”A4CE,◤ÊËeᩩÍ;.(@ÎeᩩÍᓽO)ூEFGᫀ௃ZB=ZC(ᡈ8E=CEᡈூᑖ᪆௃᪷⚪g᧕+4EB=N4EC,ZEᐳᡠ¢᪷ᐰḄᑨÓÔ᧕Ö×ÊËᩩÍ.ூ௃ZAEB=ZAEC,ZE;ᐳ.•.ØNB=NCÙ,ABE-ACE(AAS)/0BE=CE1,/XABE^^ACE(&45)0NB4E=NC4E1,/\ABE^/\ACE(ASA).ᦑBE=CE^ZBAE=ZCAE).£⚪ὃwᐰḄᑨÓᑨÓÚᐰḄeÛᨵSSSஹSAS.ASA,AAS.HL.ÜgAAA.S”KᨵÝᑨÓÚᐰᑨÓÚᐰÙÞßᨵḄàÂ[ᨵÚeáâÙÞß;ÚḄᜳ.ஹG⚪(28ᑖ)19.(1)YZ4sin60°+|3-ä|-(y)'+(n-2017)0.y-Y*1<](2)ᐜᓄç_(0--------1)+e5^ߟᐸ:xḄ_Kᨵé1ஹeḄ᦮x2+xX+2x+l[2x-l<4k12⚓/o53⚓

12ᦪ:⌱e.ூEFGᫀ௃Ä1Å473-4Ä2Å-1Wx<2.5⌱x=2îᐭP-2X-1ூ௃Ä1Åᑖïðᢣᦪòஹ~᪷Ḅᓄçஹó᦮ᦪᢣᦪôஹ°ᦪ_yZᯠö,-x<1ᔠ÷Ä2ÅᐜZøCù☢ḄZ◀ÈKᨵéÎ|ÅḄ᦮ᦪ⌱eqᐭ2x-l<4YZᓽO.পý=46-4;KᨵéḄþRTWx<2.5⌱x=2,ᐭ=-2.“”⚪ὃᦪḄ!ᢣᦪ#ஹ%&᪷Ḅᓄ)ஹ*᦮ᦪᢣᦪ#,-.,ᑖḄᓄ)0123456ᑣ89⚪Ḅᐵ;.20.=᪥?“⍗ABCᤶ᎔F᝞Hᜐᳮ”ḄK⚪LMNO᪥PᑖQRSTKᔁV1XV28᦮ᳮᦪYFZᑴḄ\]^ᨵ`᦮ḄabV.c᪷YVdefḄgh9ijᑡK⚪lCᦪm1nO᪥LMNoQRpcqV1⊡ᐙ`᦮tm2nᙠV2d“vwxyz”PᑖᡠᓰḄᙊ~8tm3nᙠ&dᵬஹஹஹoQR⌱“ᦗ”ᜓCdLMN\CSTᵨᑡ⊤ᡈ᪛VḄ60NḄ\Cា8ᵬXḄᭆ᳛.ூ¡iᫀ௃m1n200t⊡VA9᪆tm2n72tm3n-6ூ¦9௃9lm1nO᪥LMNl24+12%=200montC«l200-16-120-24=40mont᝞Vl13⚓/°53⚓

13(3)±᪛V²lᵪT/l\/l\/1\/1\7.KT»95Tᵬ•••ᐳᨵ12µ,¶·Ḅ¸¹NḄ\Cា8ᵬXḄᨵ2µwx21AP(NḄ\Cា8ᵬX)12621.᝞V¼ABCD8½T¼¾AB¿ÀÁḄ0OD,E8ÂÃNAED=45஺,(1)0ÅlCD8஺0ḄᑗÇ.(2)È஺0ḄÉÁ¿3,AE=5,0/DAEḄÊ1.ூ¡iᫀ௃(1)ÅËA9᪆t(2)6ூᑖ᪆௃(1)̸0D,᝞V᪷Yᙊᕜzᳮ²ᑮNAOD=2NAED=90஺ᑣODJ_AB,Ïᑭᵨ½T¼ḄឋÒ²CD஻AB,ᡠ¾OD_LCD,Ô8᪷YᑗÇḄᑨzzᳮ²ᑮCD800ḄᑗÇt(2)̸BE,Ö×ᙊᕜzᳮqNADEḄÊ1Øᓄ¿NABEḄÊ1.ூ¦9௃9:(1)̸OD,᝞V:ZAOD=2ZAED=2x45°=90°,14⚓/°53⚓

14A0D1AB,•¼ABCD8½T¼ACD/7AB,AOD1CD,CD8஺OḄᑗÇ;(2)9l̸BE,VAB¿ÀÁAZAEB=90°,᪷YᙊᕜzᳮlZADE=ZABE,AE5/.sinZADE=sinZABE=-----=—.AB6ᓽNDAEḄÊ186⚪ὃᑗÇḄᑨzt½T¼ḄឋÒ.ஹ9i⚪(50ᑖ)22.᝞Vᙠ½☢Àᙶ᪗ßdÀÇy=x-2àyáâãÔA,àäåæçᦪᙠè▲ᑁḄVèâãÔB(m,2).(1)0äåæçᦪḄᐵßt(2)qÀÇy=x-2ᔣ½ìFàäåæçᦪVèᙠè▲ᑁãÔC,ÃaABCḄ☢í¿18,0½ìFḄÀÇḄçᦪᐵß.Qூ¡iᫀ௃(1)y=—t(2)y=x+7.x15⚓/°53⚓

15ூᑖ᪆௃(1)îäåæ9᪆¿y=K,qBᙶ᪗ᐭÀÇy=x-2d0òmḄ1¡zòBXᙶ᪗qBᙶ᪗ᐭäåæ9᪆d0òkḄ1ᓽ¶¡zòäåæ9᪆.(2)×CöCDᚖÀÔyá×BöBEᚖÀÔyáîy=x-2½ìF9᪆¿y=x+b,Cᙶ᪗¿(a,a+b),ᵫSMBC=SþBCDE+SAABE-SAACDÿ᪷
ABC☢ᑡᐵCᙶ᪗ᐭ᪆ᑡᐵᐵὶbḄ#ᓽ%&'()*+,Ḅ᪆.ூ/௃W2(1)Bᙶ᪗ᐭ+,y=x-2<2m-2=2,<2m=4,B(4,2)ᐭ᪆<2k=8,Q...᪆Cy=?.x(2)E()*+,᪆CFx+b,C(a,a+b),IJ+,y=x-2,Kx=0y=-2,<ᑮOA=2,OCPCD_LyTOBPBE_LyTCᙶ᪗ᐭ᪆<2a(a+b)=8জ•^AABC=SZBCDE+S^ABE—SAACD=18,y-(a+4)-(a+b-2)+^--(2+2)-4-y-ax(a+b+2)=18@.ὶ<2b=7.^()*+,᪆Cy=x+7.23.C`abc◤efbᙠhᨴjh“lᓤ⁚”ᩭqr᜛tuvwxyz{|}u~16⚓/53⚓

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ᵫ⚪Ç<-20x-601+8000=6000,<¼=50,x=70,2VÉᱥ,P=-20%—60
2+ḄÊËᔣÍ800050

1724.᝞Ú×Eᙠ^ABCḄ᜜ª×DÜBCÝDEÞACJ×F,ßNl=/2,AE=AC,BC=DE,(1)à2AB=AD2(2)ßNl=60஺ᑨã4ABDḄäåæçᳮᵫ.ூ¶&·ᫀ௃(1)è᪆(2)4ABDéÜ.ᳮᵫè᪆.ூ/௃ᑖ᪆2(1)ᵫ/1=N2NAFE=/DFC%

18.,.îABDéÜ.×ï21IÕ⚪Ḅᐵð2ᵫN1=N2/AFE=NDFC<ᑮNE=/C
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