2021-2022学年湖北省武汉市汉阳区九年级（上）质检数学试卷（10月份）（附答案详解）

《2021-2022学年湖北省武汉市汉阳区九年级（上）质检数学试卷（10月份）（附答案详解）》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。

2021-2022
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()ᦪᔁ(10ᨴ)1.ᐗ3/+1=6%Ḅ■⚗#ᦪ$()A.-6B.3C.1D.62.ᵨ&'(ᐗ/—4x+1=0,-.ᑡ0123Ḅ4()A.(x—2)2=1B.(x—2)2=5C.(%+2)2=3D.(x—2)2=33..ᑡᐗᨵ6789Ḅ:ᦪ᪷Ḅ4()A.x2+3=0B.x2+x=0C.x2+2x=-1D.x2=14.<=/ஹ&4/3@-5=0Ḅ6᪷-ᑣC஽2ḄE4()A.-3B.3C.5D.-55.FGHᱥJy=-2(x-l)2+3,.ᑡᑨL23Ḅ4()A.HᱥJḄMNᔣB.HᱥJḄ⚔Qᙶ᪗4(-1,3)C.FTU$VJx=1D.Wx>1,-yXxḄYᜧ[Yᜧ6.\]ᨴḄ⃩_`$200aᐗ-b=cdeḄf⃩_`ᐳ1000aᐗ.᝞jkᙳmᨴYn᳛$x,ᑣᵫ⚪rᑡs$()A.200(1+x)2=1000B.200+200x2x=1000C.200(1+x)+200(1+x)2=1000D.200+200(1+x)+200(1+%)2=10007.t4(-2,yJ,஺(2,v3)4HᱥJy=2(%+I)2+cḄw7Q-ᑣy,2x3Ḅᜧyᐵ#4()A.71>y>73B.>y>72C.y>y2>yiD.y>y>y2333r28.FGᔣH{Ḅᱥ|-ᙠ~ᨵḄᩩ.-᪵Ḅᐵ#h=-;g/,ᐸ஻4ᓣe-v4e-g$e(g=10m/s2),r$H{Ḅ,.tv=20m/s,ᑣ.ᑡ'23Ḅ4()A.W/i=20m,-Fs67Ḅ,QB.Wh=25m,-Fs7,QC.Wh=15y,-Fs67Ḅ,QD.஻rE-ᙳFs67Ḅ,Q9.b=a,£4/+2017%+1=0Ḅ67᪷-ᑣ(1+2020a+a2)(l+20200+)ḄE$()A.4B.9C.12D.15

110.b=¡ᦪy=a(x—%)஺e2)CXUḄ£Q4(1,0)¤(3,0),ᐵGxḄa(x-x)(x-x)=m(ᐸzn>0)Ḅ67(ᑖ¦41¤5,ᐵGxḄa(x-x2§)஺-x)=n(ᐸ0|x+1|,-y-L<ᐜÖটHᱥJḄ⚔Qᙶ᪗$(-1,Ü)-ᑣᐵGxḄa/+bx+2c=m—lÝ:ᦪ᪷.ᐸ-23ḄÞß4______.■yx=-l116.᝞°-B(0,3),A$xUáQ-ÄJâ48ãQAyä,┐æç90஺ÌAC,èéOC,ᑣWOCᨬyE,-ᧅAQḄᙶ᪗4______.17.(%2-2%-1=0.18.¡ᦪy=ax2+ì+C(QH0)Ḅ°ÏḄFTU4VJí=2.÷øùQ(1,0),᪷î°Ï(ï.ᑡð⚪(1)a/+ñ+c=0Ḅ67᪷4______.(2)9a/+ᓃñ+஺>0Ḅ(ô4______.(3)yXxḄYᜧ[õyḄ¸0öxḄEÑ4_____.c2⚓-ᐳ17⚓

2x=219.\ûᵯᾯþÿ
᝞ᵯᾯᨵ121ᵯᾯ.ᙳᵯᾯᵯᾯ20.᝞ᙠ7X7!"Ḅ$%Ḅ&'!"()*+1&ᓫ-).ᡃ01&'!"Ḅ⚔34+%33A,B,C*+%3534(1,2),C(2,l).6ᑖ89ᵨ1;<.Ḅ=>?@(1)3C?AᩩCDABḄECDCD,=FᑏA%3DḄᙶ᪗@(2)3C?AᩩCDABḄᚖ=CDCE,=FᑏA%3EḄᙶ᪗K(3)LNDCEḄMᑖCCF,=FᑏA%3NḄᙶ᪗K(4)LN4BM,ONABM=45஺=FᑏA%3MḄᙶ᪗.ττττBiτ21.QRᐵTxḄ!U/-(2k+l)x+4(k-V=0(1)YZ@;[k\]^_&!U`ᨵaᦪ᪷K(2)deῪgM"ABCḄ()a=4,h(icាkl_&!UḄ&᪷Y4BCḄᕜ).22.᝞n'opq⌕ᙠᙽ(☠ᜋ(ᜋ)10w)Ḅyᙢ{ᵨ᪕}~ᡂ&"ᓄA8C£>,ᓄḄ(☠ᜋᵨ᪕}◞ᡂ&'"ᡠᵨ᪕}`)+36w4BḄ)+xw"ᓄḄ☢+S!w.(1)YSxḄᦪᐵ=FᑏAxḄ\^~K(2)Y~ᡂ"ᓄABCD☢SḄᨬᜧ^.B

323.QRABC44CB=90஺C4=CB=4,hᨵᙽeῪ=MgMḄ=M⚔3ᙠCᜐCP=CQ=2,gMCP஺3C(ᢝ3NᙠA8Cᑁ),¡FAPஹBPஹBQ.(1)YZ@AP=BQ(2)£PQ1BQ¤YAPḄ)K(3)¥CAP¥C2Q¦§T3E,¡FEC,=FᑏAUEPஹEQஹECḄᦪ¨ᐵ.24.©ªᦪy=ax?+bx+3Ḅ«x¬§TZ(2,0),B(6,0)3y¬§T3C,⚔3+E.(1)Y_&©ªᦪḄ⊤®ᑏA3EḄᙶ᪗K(2)᝞জ஺l°©ªᦪ«Ḅ±4¬{&²3£80Ḅᚖ=ᑖCាk3C¤Y3஺Ḅᙶ᪗K(3)᝞ঝNl°©ªᦪ«{Ḅ&²3¡FPCஹPEஹCE,£CEPḄ☢+30¤Y3PḄᙶ᪗.জঝ´4⚓ᐳ17⚓

4·ᫀ¹º᪆1.ூ·ᫀ௃Aூº᪆௃º@3/+1=6%ᓄ+3/—6x+1=0,••ª⚗ᦪ+—6,ᦑ⌱@A.ᡠÃ!Uᓄ+3/-6x+1=0Ḅ"ᓽÅYº.Æ⚪ὃÉᐗ©ª!UḄË"KÌÍQRᐗ©ª!Uᓄ+-Ë"lº⚪ḄᐵÏ.2.ூ·ᫀ௃Dூº᪆௃º@x2-4x+1=0,x2-4x=-1,Ð2-4x+4=-1+4,(—2)2=3,ᦑ⌱@D.Ñ⚗Ò!ᓽÅÓA⌱⚗.Æ⚪ὃÉÔºᐗ©ª!UÌÕÒ!lºÖ⚪ḄᐵÏ.3.ூ·ᫀ௃Cூº᪆௃º@Aஹ•••=02-4x1x3=-12,•!U/+3=0Ùᨵaᦪ᪷KBஹ••,=12-4X1X0=1>0,.•!U/+x=0ᨵ&à¦eḄaᦪ᪷KCஹá!UᣚᡂË+/+2x+1=0,•••=22—4xlxl=0,...!U/=-1ᨵ&¦eḄaᦪ᪷K+2xDஹá!UᣚᡂË+/I=0,02—4x1x(-1)=4>0,©!U/=1ᨵ&à¦eḄaᦪ᪷.ᦑ⌱@C.äAᔜ!UḄ᪷Ḅᑨ8Ḅ^\4=0Ḅ⌱⚗ᓽÅÓAç[.Æ⚪ὃÉÔ᪷Ḅᑨ8ᱞé“জ£>஺¤!Uᨵ&à¦eḄaᦪ᪷;ঝ£A=0¤,!Uᨵ&¦eḄaᦪ᪷Kঞ£4<0¤!U;aᦪ᪷”lº⚪ḄᐵÏ.4.ூ·ᫀ௃D

5ூº᪆௃º@᪷î⚪ïÓ•X2=ð=5.ᦑ⌱@D.=F᪷î᪷ᦪḄᐵYº.Æ⚪ὃÉÔᐗ©ª!Ua/+bx+c=0(a40)Ḅ᪷ᦪḄᐵ@d!UḄ᪷+X1X>ᑣX]+%2=_/X1X2=25.ூ·ᫀ௃Cூº᪆௃º@Aஹû-ZCO,••.þᱥḄᔣ⌱⚗ᔠ⚪BஹᱥḄ⚔(1,3),⌱⚗ᔠ⚪CஹᱥḄx=l,⌱⚗ᔠ⚪஺ஹᔣᡠ"#x>l'y)xḄ*ᜧ,-.⌱⚗ᔠ⚪ᦑ⌱C.᪷1234ᦪ6᪆89ᔠ234ᦪḄឋ;ᓽ=>?9@.⚪ὃCD234ᦪḄឋ;᪷1234ᦪḄឋ;⌲F᯿HI⌱⚗ᓽ=>?9@.6.ூMᫀ௃Dூ6᪆௃6•.•FᨴRḄ⃩TU200XᐗZᙳ\ᨴ*]᳛x,22ᨴRḄ⃩TU200X(1+x),.,•aᨴRḄ⃩TU200x(1+x)x(1+x)=200x(1+%)2,2=ᑡef200+200x(1+%)+200x(1+x)2=1000,BP200+200(1+x)+200(1+%)2=1000.ᦑ⌱D.ᐜ>ᑮ2ᨴRḄ⃩TUaᨴRḄ⃩TUklᐵnFᨴRḄ⃩TU+2ᨴRḄ⃩TU+aᨴRḄ⃩TU=1000Xᐗopᐵᦪqrᐭᓽ=.ὃCᵫu▭w⚪xy?Fᐗ23efz{Zᙳ|ᓄ᳛Ḅe~.|ᓄḄla,|ᓄḄlh,Zᙳ|ᓄ᳛x,ᑣ3|ᓄḄᦪlᐵna(l±x)2=>ᑮFḄ⃩TUḄklᐵn6⚪Ḅᐵ.7.ூMᫀ௃Cூ6᪆௃6•ᱥy=2(x+1+cḄᔣx=-l,.,.#%>-1'y)xḄ*ᜧ,*ᜧ8(1/2)஺(23)ᱥ'=20+1)2+<7ḄaI••Aᐵx=-1Ḅ(0,yi),•••y>7z>yv3ᦑ⌱c.ᐜ{?ᱥḄeᔣ᪷1234ᦪḄឋ;¡¢ᓽ=.6⚓ᐳ17⚓

6⚪ὃCD234ᦪ¥yḄᙶ᪗ᱯ©234ᦪḄឋ;ª«¬234ᦪḄឋ;6⚪Ḅᐵ.8.ூMᫀ௃Cூ6᪆௃6h=vt—^gt2,v=20m/s,g«10m/s2,•••h=20t—5t2=-5(t2-4t)=-5(t-2)2+20,.•.#t=2s'ᨵᨬᜧq20m,ᓽᱥ°ª±ᑮḄᨬᜧ²20,",³´=20m'µᨵFI'¶A.Bஹ஺ᙳ·¸.h=20t-5t2ᔣḄ234ᦪ¹ᨵᨬᜧq20,#h=157n'ºI»Ḅ'¶.C·¸.ᦑ⌱C.oI?=20m/s,gqlOzn/s?rᐭ´=a-gg/,¼ᐸᑏᡂ⚔8᪷1234ᦪḄឋ;=>4ᦪḄᨬᜧqᑣw⚪>6.⚪ὃCD234ᦪᙠu▭w⚪zḄºᵨ¸⚪ஹ«ÃÄÅ234ᦪḄឋ;6⚪Ḅᐵ.9.ூMᫀ௃Bூ6᪆௃6•••a,0ef/+2017x+1=0ḄI᪷•••a2+2017a+1=0,Æ+20170+1=0,a+p=-2017,⎅=1,(1+2020a+a2)(l+2020/?+)=(1+2017a+a2+3a)(1+2017/?+Æ+30)=9aB=9,ᦑ⌱B.ᵫaஹ£ef+2017x+1=0ḄI᪷=>a?+2017a+1=0,Æ+20170+1=0,«+/?=-2017,⎅=1,ᙠ¼(1+2020a+a2)(l+2020᜛+02)ÉÊ〉#Ḅ|Ìᓽ={?9Í.ὃCFᐗ23efḄ᪷ḄÎஹ᪷ÏnᦪḄᐵn¼⌕{Ḅrᦪ8ÉÊ〉#Ḅ|Ìᑭᵨ᦮°rᐭÓᵨḄe~ÔᨬᨵᦔḄe~.10.ூMᫀ௃Cூ6᪆௃6ᵫ⚪=Ö234ᦪy=a(x-%i)(x-×)ÏxḄØᑖÚ(1,0)(3,0),Ïy=mḄØᑖÚ(F1,Û)(5,m),

7Ïy=nḄØᑖÚ(p,n)(q,n),v04-c=0,6>c=4,ᦑMᫀ4.᪷1efḄ6Ḅᭆñ¼x=2rᐭef/-c=0,1=>ᐵcḄef6Ü=>Mᫀ.⚪ò⌕ὃCFᐗ23efḄ66⚪ḄᐵÄŪóFᐗ23efôõöpkḄ÷ÖᦪḄqFᐗ23efḄ6.12.ூMᫀ௃x(x-1)=132ூ6᪆௃6ᵫ⚪=>x(x-1)=132,ᦑMᫀx(x-1)=132.᪷1⚪=Ö\I»øáoùúḄ¥ûᔣüᐸýᡂᕒÿ〈
ᐰᐳ132ᑮx(x-1)=132.8⚓ᐳ17⚓

8⚪ὃᵫ▭⚪
ᐗ"#$%⚪Ḅᐵ()*+⚪,ᑡ./Ḅ0)
⍝ᐺ3Ḅ456⚪.13.ூ%ᫀ௃y=(x+4)2-3ூ$᪆௃$<=>ᱥ@y=/ᐜᔣCDE4FᓫHIᔣJDE3FᓫHKᡠḄ>ᱥ@⊤NO)ᱥ@]xiḄjk."#Vᦪl=a/+᱐+c(a,b,c)pᦪaq0)Ḅjk]
ᐗ"#ax?+bx+c=0᪷stḄᐵu.A=b2-4acvw>ᱥ@]xiḄjkFᦪ.4=஻
4y>0{>ᱥ@]xiᨵ2Fjk}A=b2-4ac=0{>ᱥ@]xiᨵ1Fjk}4=/
4y<0{>ᱥ@]xiᨵjk.᪷⚪,ᐵgxḄ
ᐗ"#(k-3)/+2x+l=0,ᯠK᪷
ᐗ"#Ḅw᪷ḄᑨOᩭCḄ.ூ$%௃$<•••Vᦪy=(fc-3)x2+2x+1Ḅ]xiᨵFjk"/=4-4(k-3)>0,ek-30,$k<4
k3.ᦑ%ᫀ)k<4ekH3.15.ூ%ᫀ௃জঝটூ$᪆௃$<জ•••>ᱥ@ᔣ•a>0,iᙠR@yiC•a,bh>0,•>ᱥ@]yijkᙠxiJ:.c<0,abc<0,ᦑজb+.ঝ•i)R@=-1,

9•b=2a,ᦑঝb+.ঞ%+1|=|xi-(-l)|.|x+1|=\x-(-1)|»22•••+1|>\x+1|,2"k(X1,y1)ᑮiḄ¡¢ᜧgk஺2y2)ᑮiḄ¡¢ᦑঞ┯¦.ট••>ᱥ@Ḅ⚔kᙶ᪗Q(-1,m)y>m,$•ax2+bx+c>m,••ax2+bx+c=m—1•«ᦪ᪷.ᦑটb+ᦑ%ᫀQ<জঝটজᵫᔣiH¬]yijkH¬ᑨ“6,c¯.ঝ᪷i)R@x=-1,ᓽᑮ஺hḄᐵu.ঞᵫ>ᱥ@ᔣ¡¢i¡¢±²Ḅky±ᜧ.টᵫ>ᱥ@⚔k³ᙶ᪗Qma/+bx+c>m,´µᑨa/+bx+c=m-1«ᦪ᪷.⚪ὃ"#VᦪḄḄឋ·$⚪ᐵ()¸¹cd"#Vᦪy=ax2+bx+c(a+0)ºa,b,c]VᦪḄᐵu.16.ூ%ᫀ௃(ߟ⊤0)ூ$᪆௃$<᝞ᙠxiḄb½i
k“¾஺"=஺8=3,ᙠ
kBD=AH,•Z.HAC+Z.OAB=90°,4OAB+Z.ABO=90°,:.Z-HAC=ᓃDBA,••BA=AC,10⚓ᐳ17⚓

10■■^BDA^^AHC^SAS),Z.AHC=Z.ADB,vOD=OA,^AOD=90°,Z.ADO=45°,•••AAHC=/LADB=135",•••”(3,0),"R@CHḄ$᪆OQy=x-3,•••kCᙠR@y=x-3ÎÏÐ0PleHgÕOPJoH=$Z{P(3,-3),ᓽC(3,-3),Ö4(m,0),••AB=AC,m2+32=(m-3Ù+32,$M=-|,3ᦑ%ᫀQ(—I0).᝞ᙠxiḄb½i
kH,¾OH=0B=3,ᙠ02
k஺¾0஺=0A.✌ᐜà*kCᙠR@y=x-3ÎÏ᪷ᚖ@âᨬäᓽ$v⚪.⚪ὃR@]åḄ`ᓄᚖ@âᨬäᐰçèéåḄᑨwឋ·çê$⚪Ḅᐵ()ëìíîpᵨïð@☢᪀⌼ᐰçèéå$v⚪ëìᵨôᓄḄõöõὃ⚪÷gºὃøù⚪ºḄúi⚪.17.ூ%ᫀ௃$0,...X=-bþÿj"=-(-2)M=1+2a2x1:.=1+V2,x=1—V2.2ூ᪆௃⚪ὃᐗḄ-!".#$ᐗḄ%&"'ᐜᵫ*ᦪ,-᪷Ḅᑨ0"'1ᑭᵨ,᪷!",.18.ூ5ᫀ௃7=1,x=3x<1ᡈ%>3%<22ூ᪆௃=(1)@ᱥBCD(L0),GHIJKBL=2,•@ᱥBCD(3,0),஺O2+bx+c=0ḄRS᪷$%1=1,x-3.2ᦑ5ᫀJ=%i=1»W2=3.(2)ᵫXYZ-L<1ᡈ3['@ᱥBᙠ]I^'ᦑ5ᫀJ=x<1ᡈ%>3.

11(3)•.•@ᱥB_`ᔣ^'GHIJKBx=2,x<2['ycxdᜧfgh'ᦑ5ᫀJ=x<2.(1)ᵫ@ᱥBCD(1,0)i@ᱥBḄGHឋZ-@ᱥBxIḄklmᙶ᪗'pf,.(2)ᵫ@ᱥB_`ᔣi@ᱥBxIlmᙶ᪗,.(3)ᵫ@ᱥB_`ᔣiGHI,.⚪ὃqᦪḄឋr'⚪ᐵt$uvqᦪiwx"Ḅᐵ*.19.ூ5ᫀ௃=z{|}~ᙳᵯᾯ}~xᵯᾯ'⚪-=1+x+(1+x)x=121,᦮ᳮ-(l+x)2=121,ᑣx+1=11ᡈx+1=-11,-—10,x-—12(),25={|}~ᙳᵯᾯ}~10ᵯᾯ.ூ᪆௃z{|}~ᙳᵯᾯ}~xᵯᾯ.᪷R|}~ᨵ121ᵯᾯ}~ᑡ,ᓽZ.⚪⌕ὃḄ$ᐗḄᵨ'᪷R|}~ᨵ121ᵯᾯ}~ᑡ$⚪Ḅᐵt.20.ூ5ᫀ௃=(1)᝞X'CDJᡠ'm஺Ḅᙶ᪗J(5,2)(2)᝞X,CE0ᡠ2,Emᙶ᪗J(1,4)ᡈ(3,-2)(3)᝞X'CF£CF”Jᡠ'¥mᙶ᪗J(4,0)ᡈ(6,—1),m¥''Ḅᙶ᪗J(3,3)(4)᝞X'¨4BMJᡠ'mMḄᙶ᪗Jூ᪆௃(1)«A8AmCm®ᔠ'ᑣ8mḄGmJ஺m(2)°CD±Cm²[┐(ᡈ⌮[┐)µ¶90஺-ᑮEm'ᑣCE1AB-,(3)¸¹஺£ᡈDE',ᯠ¼QE£DE'Ḅm-ᑮ¾ᑖBCF,Àf-ᑮÁmF(4)°AB±Am²[┐µ¶90஺-ᑮAM,ᑣ¨4BM=45஺.⚪ὃX-ÂᩖX=ÄÅÆ⚪ÇḄᐵt$È៉ÊËÌX&Ḅឋr'ÍᔠËÌX&ḄÊឋr°ÂᩖXÎᡂÊX'⌲ÑÒ.ÓὃxῪÕ¾&ḄឋrÖ12⚓'ᐳ17⚓

12£IGHḄឋr.21.ூ5ᫀ௃(1)ÙÚ=4=(2fc+l)2-4x4(fc-|)=4fc2+4/c+1-16fc+8,=4k2-12/c+9=(2k-3/'v(2k-3)2>0,ᓽ4>0,.•OÛk¼ÌÜ'ÝSÞᨵßᦪ᪷(2)=àb=c['4=(2k-37=0,-k=|,ᓄJ/4x+4=0,-b=c=2,f2+2=4,ᦑàa=b=4ᡈa=c=4['°x=4ãᐭ-16—4(2fc+1)+4(k—|)=0»-k=|,ᓄJ/—6%+8=0,-/-4,x-2,ᓽa=b=4,c=2ᡈa=c=4,2b=2,ᡠåæABCḄᕜè=4+4+2=10.ூ᪆௃⚪ὃ᪷Ḅᑨ0"=ᵨᐗ᪷Ḅᑨ0"(/=᮱—4ac)ᑨêḄ᪷Ḅëì=à/>0['ᨵRSwíxḄRSßᦪ᪷à2=0['ᨵRSíxḄRSßᦪ᪷à4<0['Oßᦪ᪷.ÓὃxῪÕ¾&Ḅឋr.(1)ᐜîïᑨ0"ḄÜ-ᑮA=4/12k+9,ð-ᑮA=(2k—3)2,᪷ñòᦪḄឋr᧕-4>0,ᑣ᪷ᑨ0"ḄôᓽZ-ᑮÍÛ(2)ᑖÆõÛ=àb=c['ᑣ4=(2k-3)2=0,-k=|,ᯠ-ᑮb=c=2,᪷Õ¾&Õöᐵ*ZᑨêÝ÷ëìwøùᩩûàa=b=4ᡈa=c=4['°W=4ãᐭZ-k=|>ᑣᓄJ/—6x+8=0,-O1=4,ü=2,ᡠåa=b=4,c=2ᡈa=c=4,b=2,ᯠîï4ý5஺Ḅᕜè.22.ூ5ᫀ௃=(1)᪕ÿ
36ABḄ
xBC=(36-3%)•S=%(36—3%)=-3x2+36%,ᵫ⚪0v36—3xV10,^<%<12,S=-3x2+36x(y6yḄᜧ!"#$;—

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36A8Ḅ
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1524.ூ]ᫀ௃(1)RA(2,0),8(6,0)´ᐭ¶=஺/+¹+3/)[4Q+2b+3=0a--136a+6b+3=0b=-2UVGᦪḄ᪆Cy=|x2-2x+3,y=ix2-2x+3=(x-4)2-1,•⚔Tᙶ᪗E(4,-1)(2)ÅMC8,CD,᝞f:•••C(0,3),■:UVGᦪy=^x2-2x+3Ḅx=4,.••D(4,m),!B(6,0),•:6CᙠÌ8஺Ḅᚖ7ᑖCN89CD=BC,ᦑCD?=2,BC•••42+(7n-3)2=62+3z,m=3±V29,U×ØᩩÚḄTDḄᙶ᪗(4,3+Û)ᡈ(4,3-V29);(3)CPÞᱥḄxTM,᝞f2(á]/—2n+3),CPḄ᪆Cy=kx+3,RPᙶ᪗´ᐭUä-2n+3=fcn+3,4z16⚓ᐳ17⚓

16•k=-n—2,4CPḄᐵJCy=(in-2)x+3,x=4y=4(in—2)+3=n-5,M(4,n-5),MF=n-5-(-l)=n-4,•••SXCPE=ShCEM+SAPEM=*è-%c)•ME=•(n-4),:.^n(n-4)=30,:.n2—4n-60=0,n=10ᡈn=-6>n=10,P(10,8),n=-6P(—6,24).ᡠê×ØᩩÚḄTPḄᙶ᪗(10,8)ᡈ(-6,24).ூ᪆௃(1)R4(2,0),8(6,0)´ᐭ¶=஺/+ᓃ+3,ᓽ᪆Cìᡂ⚔TCEᙶ᪗(2)ÅMCB,CD,஺(4,m),8஺Ḅᚖ7ᑖាîïðTC,;