2021年安徽省中考数学学业水平模拟试卷【附答案】

《2021年安徽省中考数学学业水平模拟试卷【附答案】》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。

ਭᵨ2021
ḕὃᦪᔁ⚗:1.ᔁὃḄ!"#$ὃ%&'ᑏᙠ⚪ᓱ,஺2./⌱1⚪2⌱345⚪ᫀ7ᵨ9:;⚪ᓱ<=⚪>Ḅᫀ᪗&@A஺᝞◤ᦋEᵨFGHIJ7K⌱@ᐸMᫀ᪗&஺/N⌱1⚪2ᫀᑏᙠ⚪ᓱ,஺ᑏᙠOᔁ,Pᦔ஺3.ὃST7Oᔁ#⚪ᓱUVW/஺Uஹ⌱1⚪YOᜧ⚪ᐳ105⚪45⚪4ᑖ,^ᑖ40ᑖ_45⚪`a3A,B,C,Dbc⌱⚗ᐸdᨵUcfgᔠ⚪>⌕jḄ1.Y4ᑖ_-7Ḅn

1ḄopY)8.4ᑖ_Ð᪥ÒÓÔ#ÕÖÔᔜ⌱3Ø"ÙÚ/M஺Y▭ᦪᝍ᪍ᓛßàá^ᑖ42ᑖ_⌱âá᝞⊤fãäÔ6"ÙÚãåÀáḄᡂçYᓫ¢éᑖ_~ᑡê¥z{ḄfY_⌱ë123456ÔìÒÓÔ362630292936ÕÖÔ253333362732A.ÒÓÔ6"ᡂçḄᙳᦪᜧîÕÖÔ6"ᡂçḄᙳᦪB.ÒÓÔ6"ᡂçḄ¢ᦪᜧîÕÖÔ6"ᡂçḄ¢ᦪC.ÒÓÔ6"ᡂçḄïᦪUðᜧîÕÖÔ6"ᡂçḄïᦪD.ÒÓÔ6"ᡂçÀÕÖÔ6"ᡂçñòð9.4ᑖ_ᙠABCAB=AC,஺póAB,ôU®~ᑡõ⚪pöõ⚪ḄfY_A.Å4D=C0=3C,ᑣN4=36°B.Å/A=36°,ᑣᳮ_AB2C.ÅùúûÌ஺pA8Ḅüýᑖᒘ®ᑣC஺ᑖNAC8AB2D.ÅC£
ᑖ/ACB,ᑣAZ2=ABB£>10.4ᑖ᝞ᙠ4BCZB=120°,A8=2ᙠEFG”EF=2«,EH=3,MஹNᑖEGHḄACMNᙠ/C!Mᜐ#$A8CD%Ḽ/ᔣ()*ᑮAN,ᔠ./0C)*12.x,,ᔠ3ᑖḄ☢5.6ᑣyᐵ!xḄ9ᦪ;ᜧ=.>

2DH1B@ஹBC⚪>Eᜧ⚪ᐳ4G⚪HG⚪5ᑖIᑖ20ᑖ11.>5ᑖMNO3x+l>5x-1ḄUV.12.>5ᑖWOᑖUX-xy—.13.>5ᑖ᝞yi=L-\]x^y^ᑖ_!A]`ab9ᦪ”=K22xḄ;ᙠef;▲ᑁ_!C,஺.^lm^fDAA.BC,noC8OḄ☢5.rᑣk-.214.>5ᑖ᝞tuABCOAB//CD,AB=8,BC=9,Pஹ஺ᑖ.BCஹCD±wxᐜ$tu%APᢚ|}8Ḅ~.8,%஺ᢚ|CḄ~஺ាᙠPB,h.>1/AP஺ḄᜧG..

3(2)AB_LBC8'஺ntan/B'QC=2,ᑣCQ=5ஹ>Eᜧ⚪ᐳ2G⚪HG⚪8ᑖIᑖ16ᑖ15.8ᑖUX?-2x=4x-5.16.8ᑖ᝞HGlḄuᙳ.1ᓫABwAஹBᙠ>wᩩḄ_.>1
$A8ᔣ)*2ᓫᔣ()*4ᓫ)*~4E>2
$45⌮┐a90°

4tஹ>Eᜧ⚪ᐳ2G⚪HG⚪8ᑖIᑖ16ᑖ17.>8ᑖᨵ¥ᑡNO:e1NOX2@.\@323e2NOXQJ.4-J434e3NOX4/•G©ª©545e4NOX5«.4656ᢥ᯿®¯°U±¥ᑡ²⚪X>1ᑏe6NOX>2ᑏµ¶·Ḅe"NOX>ᵨºnḄNO⊤¼½¾¿.18.>8ᑖᔠÀÁ“ÄᔠÀ•ᜧÅÆ”ÇxÁÈÉ!2020Ë4ᨴ28ÍÎÏÐÑÒᔣᐰÁÔÕ✌×ᢗÙ6000ÚᐗÜÝᑶßᖪÅᨵᵬஹâwãäᙳ.40ᐗḄᝅ⚶ᐸᵬᝅ⚶è®}ᵨ“I40é10ᐗ”Ḅ⚶êÜÝᑶâᝅ⚶Mè®}ᵨëìíEᕜᵬᝅ⚶Ḅ├ðñaᕜòó40%,âᝅ⚶Ḅ├ðñaᕜ¥õ10%,ᨬ÷ø├ðñEᕜaᕜù20%,0ᕜᵬᝅ⚶Ḅ├ðñ.aû.>1ᵨºᨵaḄOü⊤¼ᕜâᝅ⚶Ḅ├ðñ>2nEᕜᵬᝅ⚶Ḅ├ðñaâᝅ⚶Ḅ├ðñý120ûþaḄÿ.

5ஹᜧ⚪ᐳ2⚪⚪10ᑖᑖ20ᑖ19.10ᑖ202012ᨴ5ᐰ☘ᜧḕᙠᔠ!",$ᙢ☢Aᜐ()BஹCᑖ*+,-A.30/Ḅ1ᜐ23.4AஹBஹC5.ᙠ67ᩩ9:;.<=>?@Ḅ$4.ᚖ9()ᑮC஺ᜐEᙠC23.FG.DḄHI+30°,5JKL9:;ᓣᑮEᜐᙠB23.FG.EḄHI+53°,N$OᑮEḄPᙳRS.TὃᦪWXYF.73,sin53°Z0.80,cos53°^0.60,tan53°21.33
20.10ᑖ᝞\জAB^஺஺Ḅ9_EF^`A஺ஹ8Cᑖ*ᚖ9aEFḄbc:ᚖdᑖ*+஺ஹC.1
NeXDE,DF=CFCE2
᝞\ঝghAEஹBF,NEAB=/FBA,ᑨjklmA8CDḄmnoep.DDCজঝ

6qஹ(⚪ᑖ12ᑖ)21.(12ᑖ)ᑁwxyz(GDP)ᢣᢥ}~Ḅ7(ᡈᙢ)ᡠᨵᓫᙠ7EᑁwxḄᨬᡂ+^⊝(ᡈᙢ)nḄᨬᢣ᪗.6᪷Wᔜᙢ£¤¥¦Ḅ2020ᔜ}GDP£ᦪW¨©}2020GDPz+x®ᐗ°ᐸᑖᡂ²A(700^x<1500)>B(1500Wx<2300)ஹC(2300WxV3100)ஹ(x23100¼½¾ᐸ¿GQPᵫÂᑮÃḄÄ5Åᑖ*^ᔠ!10045.7®ᐗÇÈ3753®ᐗÉÊ3032.1®ᐗ᪷WĘ̈Íᑴ²£⊤Ðᩩm£\ÑᑖÒÓ᝞ÔX½¾GOPzÖ⚣᳛A700«0.31251500B1500«b2300C2300«C3100Dx231000.125Ú᪷W\⊤¿ÛÜḄÒÓÝÞÔᑡà⚪X(1)a—,b—,c—á(2)6ᩭãä;ᙢ¿Ḅ<7å}᝛ç⍝ãéᡠᙠå}2020ḄGOPzê᝛ëç⍝ãéᡠᙠå}2020GDP^ᔲᜐa¿;í᝛◤⌕ç⍝ðñ£Úòpᳮᵫá(3)ê$GDPzôÃa2300®ᐗḄå}¿õ⌱1²÷ᐸø1GDPzḄùᓄûN6E⌱¿ÇÈÐÉÊḄᭆ᳛.ᦪý0BD

7Zஹ(⚪ᑖ12ᑖ)22.(12ᑖ)ᙠP☢9Iᙶ᪗ÿ
ᱥy=a/-2"-3a(a<0)xAஹB!(AᙠBḄ)
!C(l,-2),D(2,3)ஹE(4,5)'Ḅᐸ)
*y=x+/n!A.(1)ᑨ/ᱥy=o?-2"-3஺(aVO)!CஹDஹEḄ6
78ᳮᵫ;(2);(3)?PA*y=x+,஻CDᱥCE)(FGᔠ)
IPB*y=x+mM
ᑣL•Nᔲᨵᨬᜧ>S᝞Uᨵ
;᝞UWᨵ
X78ᳮᵫ.BMZஹ([⚪]ᑖ14ᑖ)23.(14ᑖ)᝞_জ
ᙠRtaABC
ZABC=90°,AB=BC,஺ABCcCḄ,IdA஺
eBELA஺
ᚖhAE,ijBEACF,IdCE.(1)

8qὃsᫀ)ஹ⌱v⚪w[ᜧ⚪ᐳ10y⚪
zy⚪4ᑖ,]ᑖ40ᑖ{zy⚪|}VA,B,C,D~⌱⚗
ᐸᨵ)Nᔠ⚪⌕<Ḅ1.4ᑖ{-7Ḅ>Aw{A.7B.AC.-AD.-777sᫀm-7Ḅ>7,ᦑ⌱mA.2.4ᑖ{«•w-/
3UḄNw{A.a1B.-a7C.a6D.-a6sᫀma•-a?
3=஻•w-46
ᦑ⌱mB.3.4ᑖ{ᑡḄ__ᐰḄNw{sᫀmAஹ_N
_Nᙊ
ᦑ[⌱⚗Fᔠ⚪;8ஹ_NῪ'¢
_N£ᙊ¤Ḅᙊ
ᦑ[⌱⚗Fᔠ⚪;Cஹ_N
_N'¢
ᦑ[⌱⚗Fᔠ⚪;஺ஹ__ᐰ
Nᙊ
ᦑ[⌱⚗ᔠ⚪.ᦑ⌱mD.4.4ᑖ{¥¦§¨©ª«¬®¯°±Ḅᦪ¥
2020³ᐰ³ᡃḕ¶·®¸¹º803.8»¼
¸¹½ᐰ¦¾4¿.ᐸ803.8»ᵨÁÂÃᦪÄ⊤ÆAw{A.0.8038X1011B.803.8X108C.8.038XIO10D.8.038X109sᫀmm803.8»=80380000000,¾)ᦪ8Ç☢ᨵ10ᦪ
A803.8»ᵨÁÂÃᦪÄ⊤ÆA8.038X1O10,

9ᦑ⌱mc.5.4ᑖ{ÉÊAxi,yi
,Bx2,y2{ᙠËÌÍÎᦪy=-3Ḅ_ÏC
?yiVOV”,xᑣᑡÐḄNw{A.0Aw{DA.2V2B.2V3C.D.3sᫀm᝞_
IdA£>,OC.

10BD'(ZB0C=2ZBDC,ZBDC=30°,(.ZBOC=60°,,:OC=OB,...ãBOCNc'¢
(.OB=BC=2,(.AB=2OB^4,NäḄ
AD=DB>(.AD=DB,'(ABN*à

NAOB=90°,è48=2ᧇ
2ᦑ⌱mA.8.w4ᑖ{ë᪥íîïðñïᔜ⌱VóôÂõqöIMOw¦▭ᦪÂᝍ᪍ᓛûüý
]ᑖ42ᑖ{⌱þý
᝞⊤Nÿ
6ḄᡂᓫᑖᑡḄ⌱123456
!&'
362630292936*+
253333362732A.&'
6ᡂḄ/ᙳᦪᜧ3*+
6ᡂḄ/ᙳᦪB.&'
6ᡂḄ5ᦪᜧ3*+
6ᡂḄ5ᦪC.&'
6ᡂḄ7ᦪ89ᜧ3*+
6ᡂḄ7ᦪD.&'
6ᡂ*+
6ᡂ;<9

11=ᫀ?A.&'
6ᡂḄ/ᙳᦪ@A(36+26+30+29+29+36)=31,6*+
6ᡂḄ/ᙳᦪ@A(25+33+33+36+27+32)=31,6ᡠDE⌱⚗GGHᔠ⚪KLB.&'
6ᡂḄ5ᦪ@29.5,*+
6ᡂḄ5ᦪ@32.5,ᡠDE⌱⚗GGHᔠ⚪KLC.&'
6ᡂḄ7ᦪ@29M36,*+
6ᡂḄ7ᦪ33,ᡠDE⌱⚗┯OGHᔠ⚪KLD.&'
6ᡂḄPQ@.1[2X(31-36)2+(31-26)2+(31-30)2+2X6(31-29)2]=14,*+
6ᡂḄPQ@(31-25)2+2X(31-33)2+(31-36)2+(31-27)62+(31-32)2J=14A.3V14<14A,3&'
6ᡂ*+
6ᡂ;<9ᡠDE⌱⚗Hᔠ⚪KLᦑ⌱D.9.(4ᑖ)ᙠaABC5AB=AC,஺@VA3WXK8YᑡZ⚪@[Z⚪Ḅ()A.AD=CD=BC,ᑣNA=36°B.]NA=36°,ᑣ__AB2C.]᝞b7,c஺@ABḄdeᑖᒘYᑣCD/ᑖ/AC8AB2D.]CO/ᑖg4c8,ᑣ=ᫀ?Aஹ'(AB=AC,AD=CD=BC,(.ZA^ZACD,NB=/ACB=/CDB,iN4=x°,ᑣNAC£)=N4=x°,NB=ZACB=NCDB=ZA+ZACD=2x°•NA+N8+NACB=180°,x+2x+2r=180,•»x=36,

12...NA=36°.ᦑj⌱⚗GHᔠ⚪K.Bஹ᝞k15lCT/ᑖNACB,ᑣNACT=/3CT=36°,/A=NBCT=36°,(./\BCT^/\BAC,•BC-BT••…,---ABBC:Bd=BT*BA,VZA=ZACT=36a,ZB=ZCTB=12°,(.AT=TC,CB=CT,AT=CT=BC,BC=CT=AT=x,AB=y,ᑣᨵ/=y-x
y,.,7+p-y2=o,.”=rsyᡈuvywx22•x_••—-----,y2ᓽ}=ᙠ11,j⌱⚗GHᔠ⚪K.AB2Cஹ]~"izl,c஺@ABḄdeᑖᒘYY஺ᨵ┯O.j⌱AB2⚗GHᔠ⚪K.Dஹ]C£/ᑖ/AC2,4D2=ABB£
G89ᡂ┯Oj⌱⚗GHᔠ⚪Kᦑ⌱B.

13D,------------10.4ᑖ᝞kᙠABCD5/8=120°,AB=20ᙠEFGH5EF=2«,EH=3,MஹNᑖEFMGHḄ5YcACMMNᙠ/WYC3YMᜐA8CDḼ/ᔣ/ᑮYAMYNᔠ@iYC/@x,MᔠᑖḄ☢@ᑣyᐵ3xḄᦪkᜧ¡@=ᫀ?¢£8஺¤AC3YO,•.•¥VABC஺(.AB=BC^CD=DA,ACVBD,80/ᑖNA3C,'(ZABC=]20°,AZABD=ZCBD=60°.(./XABD7ACBD@¦V§:.BD=2M8A0=ABXsin60°=3.

14(.AC=2AO=6.¨0WxW3«Mᔠᑖ@¦V§E«§Ḅ¬@ᑣ®§ḄV¯@°ᡈ3_._12MM2Vvv233.•.¨0WxW3«yᐵ3xḄᦪk@´ᱥ¶=◀*2Ḅ8ᑖL(.B,஺⌱⚗GHᔠ⚪K;¨3cxW6«Mᔠᑖ@»VBPQDRS,᝞kE«ÀCPQÁÀ4/?$ᙳ@¦V§Ly=S9:ABCD-S&CPQ~S^ARS=—XAX(x-3)ÅfÆ(x-3)-Ax(6-x)X;ஹ'<(6-x)27s2323=->-9?3=_2«9S29V3+----------1Y--------J------'3,22...¨35x-1Ḅ?Øx<\.

15=ᫀ?:3x+l>5x-1,⚗Ú3x-5x>-1-1,ᔠÛÜ⚗@-2x>-2,Ýᦪᓄᡂ1,Úx

16VZAOB=90°=ZDOAf(./\AOB^/\DOAf••OB—_—1—_AO,OA2DOîL04=1,0B=2200=2,BD=0B+0D=l.+2=5,22D•:/\CBDḄ☢@ê]iYCḄõᙶ᪗@x,2.•ÆXøùús222.".x=2,ûᐭyi=L-_lÚy=—,222.•.YC2,A,2.•.%=2X2=1,2ᦑ=ᫀ@1.14.5ᑖ᝞k¥VA8CQ5AB//CD,AB=8,BC=9,Pஹ஺ᑖ@BCஹCD±þYᐜ
APᢚBḄ᜛஺ᢚCḄ஺ាᙠP8'.(1)NAP஺Ḅᜧ$90°((2)*4B_LBC./0B'Q,3tan/BQC'=2,ᑣCQ=_-2°0+5\/160952?ᫀABC1D᝞F1G,

17AZAPQ^ZAPB'+ZQPB'(NBPB*+ZCPB')=AzBPC=90",ᦑ?ᫀB90°.(2)᝞F2G,(.CD±BC,:.;C=4PCQ=/QC'B'=90°,VtanZB,QC'=I'J=2,QC/5...KLᎷNB'C=2x,QC'=QC=5x,NPC=y,ᑣPC'=PC=y,PB=PB2x+yf/.2r+y+y=9,x+y=aজ2VZB=ZAPQ=ZC=90Q,N4PB+NQPC=90°,ZQPC+ZPQC=90°,,./APB=/CQP,(.XXBPsXPCQ,

18.•.ᙶ=R"PCCQ8.2x+yA=@ry5xᵫজঝKYx=Y°+[\C]^_`abD2-32cd2____ᦑ?ᫀB-200+5416092eஹCgᜧ⚪ᐳ2$⚪j$⚪8ᑖlᑖ16ᑖD15.C8ᑖDAmnB?-2x=4x-5.?ᫀABX2-2X=4X-5,᦮ᳮYB/-6x+5=0,rR஺=1,b—-6,c=5,VA=*2-4ac=C-6D2-4XlX5=16>0,.-b±Vb2-4ac6±V162a2X1AYBxi=5,X2=\.16.C8ᑖD᝞Fm|}j~$mḄᙳ1~ᓫABAஹBᙠ|Cᩩ|Ḅ|D.C1DABᔣ2~ᓫᔣ4~ᓫA8(C2D4bB'⌮.┐aC90°

191~B¡3232~B-34343~B4/■¡£545

204~B¡e,6,56ᢥ᯿L¦§A¨©ᑡ«⚪:1
ᑏ6~B7J£¡£=®(8'7-8-2
ᑏ¯°±Ḅ஻~BCD4--2-Jntll-Cᵨ´஻Ḅ⊤n+1J"Jn+2n+1n+2—¶D·¸¹.(1+1)2?ᫀABC1
•.•1~B:4,ᑣ(1+1).1.13231+2'1+11+222.2(2+1)2~B■¡2ºᑣC2+1
2+2-2+1-2+223.3(3+1)3~B4/•+33•ᑣC3+1
5453+23+13+224.4(4+1)4~B5᫣¡¼ᑣC4+1D6564+2*4+14+2...6~B7-g.£=½;878ᦑ?ᫀB7J£■£=ᙶ(878n_(n+1)22
°±B"~BCn+1
-L''n+2n+1-n+2¸¹:"A¿+ᾓ—((z+1)-_n_x+1n+2n=(n+1)-Hiln+2=(n+1)(n+2)_n+ln+2n+2—(n+1)(n+2)-(n+1)n+2—(n+1)(n+2-1)n+2—(n+1Án+2(n+i)_ÂL-+3_®jiᡂÄ."n+2n+1n+2ᦑ?ᫀB("'n+2n+1n+2

2118.(8ᑖ)ᔠÆÇÈ“ÊËᔠÆ•ᜧÌÍ”ÎÏÇÐÑÒ2020Ó4ᨴ28ÕÖ×ØÙÚᔣᐰÇÜÝ✌ßᢗá6000âᐗäåᑶçᖪÌᨵᵬஹëìí|ᙳ40ᐗḄᝅ⚶ᐸGᵬᝅ⚶KLᵨ“l40ñ10ᐗ”Ḅ⚶òäåᑶëᝅ⚶óKLᵨ`ôõgᕜᵬᝅ⚶Ḅ├øùúᕜûü40%,ëᝅ⚶Ḅ├øùúᕜ©þ10%,ᨬ
├ᕜᕜ20%,ᕜᵬᝅ⚶Ḅ├a.(1)ᵨᨵaḄ⊤!ᕜ"ᝅ⚶Ḅ├#(2)$ᕜᵬᝅ⚶Ḅ├"ᝅ⚶Ḅ├%120&'aḄ(.)ᫀ+,(1)ᕜ"ᝅ⚶Ḅ├x&ᵫ⚪01,a(1+40%)+x(1-10%)=(a+x)(1+20%),+13ᦑᕜ"ᝅ⚶Ḅ├2#3(2)ᵫ⚪01,a(1+40%)-2,(1-10%)=120,3+1,a=150,ᦑaḄ(150.9ஹ(ᜧ⚪ᐳ2=⚪&>=⚪10ᑖ&@ᑖ20ᑖ)19.(10ᑖ)2020B12ᨴ5D&E9FᐰH☘JBKLMᜧN(OPḕN)ᙠᔠTUN&KLMVᙢ☢Aᜐ[\&BஹCᑖ^_`Aa30cḄdᜐefa&gAஹBஹChaᙠijᩩlm.nopqrḄKLMVAaᚖl[\ᑮuDᜐv&ᙠCefaw1aDḄxy30°,5{|}&KLMlmᓣᑮEᜐ&ᙠBefaw1aEḄxy53°,'KLMV஺ᑮEḄᙳ.(ὃᦪ,.73,sin53°0.80,cos53°^0.60,tan53°g1.33))ᫀ+,ᵫ⚪01,ZDAC=ZEAB=9Q°,AB=AC=30c,ᙠRtZXACZ&NC=30°,

22#tanC=^=&AC3.\AD=^H-AC=\0y[3c&3ᙠRtZ\4BE&ZABE=53a,Vtan1.33,AB.*.AE=L33AB=L33X30=39.9c
&(.DE=AE-AD=£39.9-1073c22.6c&22.6+5=4.52c/{&),KLMV஺ᑮEḄᙳ¤4.52c/{.20.£10ᑖ᝞¦জ&AB¨஺஺Ḅl©&EFHI,A஺ஹ8cᑖ^ᚖlªEFḄ¬m&ᚖᑖ^஺ஹC.£1'®,DE8DF=CFCE£2᝞¦ঝ&°±AEஹBF,$ᑨ³´µ¶ABC஺Ḅ¶·&¸®¹.)ᫀ£1®¹,᝞¦&ºE»ḄaM,°±OM,E»Ḅa&஺ᙊ¿&J.OMLCD,(.EM=MF.ADLCD,BCYCD,(.AD//OM//BC.DAO=BO,:.DM=CM,DM-EM=CM-MF,ᓽDE=CF,(.DE+EF=CF+EF,BPDF=CE,DE*DF=CF,CE

23(2)+,´µ¶ABC஺¶&®¹᝞Ã:■:NEAB=NFBA,...Å8£,=Å4Ç...Å4£#=Å8Ç(.AE=BF.ᵫ(1)È&DE=CF,(.Rt/XADE^Rt^BCF(HL),(.AD=BC.y.AD//BC,&´µ¶ABC஺É´µ¶,'JADLCD,&´µ¶ABC஺¶.21.(12ᑖ)HᑁËÌ
((GDP)ᢣᢥÏÐÑÒÓÔḄjÕHÖ(ᡈᙢØ)ᡠᨵÚÛᓫÝᙠjÞvßᑁËÌàáḄᨬᡂä&Úåæç¨⊝HÖ(ᡈᙢØ)éê·ëḄᨬìᢣ᪗.îîiï᪷OPᔜᙢòÓóôõḄ2020BOPᔜÏGDPòÓᦪöä&>ÕÏ2020BG£>P(xùᐗ&ûᐸᑖᡂý4(700Wx(1500)ஹB(1500Wx<2300)ஹC(2300WxV3100)ஹ(x23100)ᐸG£)PᵫᑮḄᑖᔠ10045.7%ᐗ'(3753%ᐗ)*3032.1%ᐗ᪷,-./01ᑴ345⊤7ᩩ945:;ᑖ<=᝞?@GDPCDE⚣᳛A700Wx<0.31251500

24B1500Wx

25(3)GCPCs2300%ᐗḄcdᨵ5±'(ஹ)*ᑖ²AஹB,ᐸ³3cdᑖ²Cஹ஺ஹE,´᪛¶:᝞:@·¸ABCDE/Ax/TVx/TVBCDEACDEABDEABCEABCDᐳᨵ20º¯»Ḅ/0Z⌱'(7)*Ḅ/0ᨵ2ºZ⌱'(7)*Ḅᭆ᳛2=¼.2010½ஹ(¾⚪¿ᑖ12ᑖ)22.(12ᑖ)ᙠ¦☢ÁÂᙶ᪗ÅÆᱥÈ)=--2ar-3a(a<0)©xËÌsAஹBÎ(ÎAᙠÎBḄÏÐ)ÑÒÓÎC(1,-2),D(2,3)ஹE(4,5)ÎḄᐸbÎÁÈy=x+ÕÒÓÎA.(1)ᑨ×ÆᱥÈØ=--2Ù-3஺(«<0)ÒÓCஹDஹEḄÛÎÑz{ᳮᵫX(2)aஹmḄCX(3)mpÁÈ_ÜÆᱥÈ_bÎ(©ÌÎÝᔠ)ÞP3ÌÁÈsMÎᑣáᔲᨵᨬᜧCâ᝞0ᨵãᨬᜧCX᝞0äᨵLz{ᳮᵫ.BMPᫀ@(1)ÆᱥÈy=o?-2ax-3a(a<0)ÒÓÎ஺ᳮᵫ᝞?@çÆᱥÈᓄÌÎèy=a(x+1)(x-3),éy=0,ᑣx=-1ᡈ3,,ÎAᙠÎ8ḄÏЕ•ÎAḄᙶ᪗(-1,0),Î8Ḅᙶ᪗(3,0),V«<0,••ë-lீx<3y>0,ëxV-1ᡈx>3y<0,ᦑ᣸◀CஹEÎ,ÆᱥÈ-2ax-3a(a<0)ÒÓÎDX(2)ç஺(2,3)ðᐭy=o?-2Ù-3஻(஻V0)@4஺b4஺-3஻=3,@a--1,

26ÆᱥÈ᪆è@y=-+2x+3,çA(-1,0)ðᐭy=x+m,@0=-1+Õ@Õ=1,,•ÁÈ᪆è@y=x+l,♦஺=-1,77?—1X(3)éy=-/+2x+3=x+l,xi=-1.X2=2,ÆᱥÈ_bÎôÎPḄᙶ᪗(p-p2+2p+3),ᐸ7

27ûPG=-/+2p+2-p=-p2+p+2--(/?-A)2+þ24.•.ëp=¼PGᨵᨬᜧC2,249_ᦔ==AB416ᳮᨬᜧa.BM16ஹ(⚪ᑖ14ᑖ)23.(14ᑖ)᝞জᙠRt/XABC#NABC=90°,AB=BC,)஺BC+,Ḅ#),/0A஺18ELAO,ᚖ7)E,89BE:AC;)F,/0CE.(1)=>?AF=2CF(2)=>?CE2=AEBE(3)᝞ঝA)B1FG_L8F,:BC;)G,CE=3,=CG9.জঝDᫀ(1)>F?᝞জ#A)஺1£>G஻BF:4c;)G,জ,:BD=DC=LBC,AB=BC.2'(DG//BF,•FGBD2==(,•BC:.FC=2FG.:NBAE=NBAD,NABO=/4EB=90°,:.AAEBsAABD,

28AB=AEADAB(.AB2=AE'AD,MNOPBD2=DE-AD,.AEAB2(2BD)2^-=/1DEBD2BD2'(DG//BF,.,.S=T_=4,FGDE•AF=AF=ஹ.•♦U2FG(.AF=2FC.(2)>F?᝞জ#•.,BO2=DfD4,CD=BD,(.CD2=DE'DA,/.CD=DA,"DECD''(ZCDE=NADC,(.^CDE^/\ADC,(.NDCE=NCAD,•.,N£>EC=/AC£>=45°,NDEF=90°,(.ZCEF=ZCED=45°,.•.N4EC=NCEB=135°,(./\CEBsAAEC,CEEBA=>*'AEEC'(.CE1=AE-EB.(3)X?᝞ঝ#Y஺E=m,ᑣEB=2,஻AE=4m,

29•:Cf=AE*EB,9=8m2,Vm>0,•••mni=-&&,4_____________]^_+]a-ab8=08=cd2"JFGLBFADVBF,.,.GF//AD,.CGCF=1,=*,DGAF.•.CG=1C£>=0^..32