2021-2022学年湖北省武汉市洪山区九年级（上）测评数学试卷（10月份）（附答案详解）

《2021-2022学年湖北省武汉市洪山区九年级（上）测评数学试卷（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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8:⚪_⌕ὃ=ᐗᐗaᵨḄ7ᨵc*de7ஹMNᑖ7ஹLN7gh7⚪Ḅᐵi᪷Ḅᱯk⌱lmnḄ7.12.ூᫀ௃1000ூ᪆௃ூᑖ᪆௃:⚪ὃ=>ᐗḄrᵨst⚪ᐵi᪷⚪uᑖvᑡUBx▤z{>|}Ḅ~ᦪ.ᵫWeᙳV~Ḅ~ᦪx~\2ᨵ(1+x)~{>|},\2ᨵQ+)+M1+~{>|}J᪷2ᐳᨵ100~{>|}ᑡUZUxḄXT!ᑮ\2{|}~ᦪ.ூ௃eᙳV~Ḅ~ᦪ)x~\2ᨵ(1+X)V~}\2ᨵ(1+X)+x(l+X)V~}ᵫ⚪u'1+%+x(l+%)=100,᦮ᳮ!x2+2X-99=0,!x=9ᡈ11,x=—11Bᔠ⚪u.eᙳV~Ḅ~ᦪ)9~.\2{|}~ᦪᐳᨵ100+9x100=1000.ᦑᫀ)1000.13.ூᫀ௃3¡k#2ூ᪆௃••,¥ᦪy=(fc-2)x2+2x+1Ḅ©ª-x«ᨵ¬kᐗ(k-2)x2+2x+l=0ᨵ(k-2Ko"(°=22-4(/c-2)=12-4fc>0,!k<3¡k*2.ᦑᫀ)´33¡´2.᪷¥ᦪ©ª-x«ᨵ¬k'!UᐵWxḄᐗᨵ᪷᪷ḄᑨvN¶ᔠ⚗.ᦪ·¸ᓽ'!UᐵWkḄᐗB¹NºB¹Nºᓽ'!U¶».:⚪ὃ=>¼ᱥ¾-x«Ḅ¬kஹ᪷ḄᑨvN¿gᐗB¹Nº᪷᪷ḄᑨvN0¶ᔠ⚗.ᦪ·¸ÀUᐵWkḄᐗB¹Nº⚪Ḅᐵi.14.ூᫀ௃1440ூ᪆௃y=120t-2.5/=-2.5(t-24)2+1440,.•.Ãt=24ÄyÅ!ᨬᜧ1440,

9ᓽÈÉḼ▮2ËÌ1440ÍÎÏÐÑᩭᦑᫀ)1440.O¥ᦪ᪆Nhᡂ⚔kNZUyḄᨬᜧᓽ'!.:⚪_⌕ὃ=¥ᦪḄrᵨᳮ⚪u!UÈÉËÌḄÕÖᓽ)yḄᨬᜧ⚪Ḅᐵi.15.ூᫀ௃×=—5,x=12ூ᪆௃.•¼ᱥ¾y=Q஺+37+kᵫ¼ᱥ¾¾y=a(x-/i)2+kᔣPeH3VᓫÛᡠ!,¡ᱥ¾y=Q(%-Ý+ᦇ-x«¬W(2,0)ஹ(4,0),•¼ᱥ¾y=a(x-h+3)2+k-x«¬kᙶ᪗)(5,0),(1,0),•%=-5,x=1)a(%—+3)2+k=0Ḅ2ᦑᫀ)%i=—5,x=1.2ᵫ¼ᱥ¾y=a(%-/+k-x«Ḅ¬k'!¼ᱥ¾y=a(x+37+஽-4«Ḅ¬kᙶ᪗XTZ.:⚪ὃ=¼ᱥ¾-x«Ḅ¬k⚪ᐵiâã¥ᦪ©ªeHḄäåâã¥ᦪ-Ḅᐵ..16.ூᫀ௃ÃSmWæ92ூ᪆௃•4(0,6),8(6,0),:.AO=BO=6,.•.O°C20¿k஺)çèéçè90஺!ᑮaEBO,ê©᝞ÑZ.AOC+/.DOB=45",ì•••çè■1•Z.AOC=Z.BOE,0C=OE,AC—BE,)BOE+Z.DOB=Z.EOD=45°,ᙠ°C஺஺-°E஺஺\10⚓ᐳ18⚓

10OC=OE)COD=Z.EOD=45",.OD=OD•••°COD^AEOD,-CD=ED,•,C4_Ly««S.AC=3,•C(3,6),AC=BE=3,kD(6,a),ᑣED=Q+3,:.ED2=(a+3)2,CD2=(6-3)2+(Q-6)2,•(Q+3)2=(6-3)2+(Q—6)2,!Q=2,:.D(6,2),¾CDᡠᙠḄc¾⊤ïN)y=kx+b(k^O),OC(3,6),D(6,2)5ᐭ!:{:ñò,!´7,lb=10••¾zCZ)ᡠᙠḄc¾⊤ïN)y=-^x+10(3<%<6),ì•¥ᦪy=-òô2+m-¾zCZ)ᨵVLᐳk8õ2---x4-80-8/71=0,3A=(-\2-4(80-8m)>0,!m>^,_32ì,••-¾zC£>ö¬3WxW6,¡y=/÷x+80-8mḄøù«)X=-3=úr328m-80<62--x6,3!m?@Aᐰ2ḄᑨDEឋGஹIᐗKḄᑨL3M!ᦪ%123ḄNᔠ᪷PᐵRS8⚪TᐵU.

1117.ூᫀ௃8Q=1,b=—3,c=—2X.b*234-4ac=(-3y-4x1x(-2)=9+8=17>0X—b±Vb2-4acAX=---------------------2a3±V17=-----------,23+>/173-7170•Xi=X2=ூ8᪆௃;⚪⌕ὃ>8Iᐗ~Ḅ8}.⌕ᵨ3}7Iᐗ~Ḅ8.}〉ᵨIᐗ~.3}Ḅজᓄ~IA3Xঝmb,ঞ72I4Xটᐭ3=-b±y/b2-4ac2a'18.ூᫀ௃/=-3,x=1(-1,4).x<-3ᡈx>lx>-12ூ8᪆௃8পᵫI/-2%+3=0:ᑐ2+2x-3=(x+3)(x-1)=0.8`=-3,x=1,2ᦑᫀXj=-3,x=1.2(2)vy=-x2—2x+3=—(x+I)2+4,••bᱥ&⚔ᙶ᪗ᦑᫀ:(—1,4).(3)•.•bᱥ&fgᔣi%xj+ᙶ᪗(-3,0),(1,0),•••x<-3ᡈ%>1my<0,ᦑᫀn<-3ᡈ%>1.(4)•.•bᱥ&fgᔣipqjr&x=-l,x>—lmysxtᜧvwx.ᦑᫀx>—1.(1)ᑭᵨ{3ᑖ8}8Iᐗ~.(2)!ᦪ8᪆3ᓄ⚔378.(3)ᵫbᱥ&fg~ᔣbᱥ&%xj+ᙶ᪗78.(4)ᵫbᱥ&fg~ᔣMpqj78.;⚪ὃ>!ᦪḄឋG8⚪ᐵUT!ᦪ%~M123Ḅᐵ!ᦪ#$%ᦪḄᐵ.19.ூᫀ௃8(l);A20mIᐗ~ᨵ)*ᦪ᪷A=[2(m+I)]2—4x1x(m2-3)=8m+16>0,m>—2,•7nZ-2m~ᨵ)*ᦪ᪷.(2),:xf+xf—xix2+33,12⚓ᐳ18⚓

12•••(Xj+x)2—3xx=33,2t2,■x+x=—^=2m+2,-x==m2—3,r22'■(2m+2)2—3(m2-3)=33,8m=2ᡈ-10(£¤)ᦑmḄ¦Tm=2.ூ8᪆௃(1)᪷⚪§4=[2(m+I)]2-4x1x(m2-3)=8m+16>0,78ᓽ:,(2)ᑭᵨ᪷%ᦪḄᐵE©R(26+2A—3(m2-3)=33,8~ᓽ:.;⚪Nᔠὃ>᪷ḄᑨL3E᪷%ᦪḄᐵIᐗ~᪷Ḅª«%ᑨL3Ḅᐵ(1)4>0o~ᨵ)*1P2Ḅᦪ᪷(2)/=00~ᨵ)*P2Ḅᦪ᪷(3)4<0=~®ᨵᦪ᪷.20.ூᫀ௃8¯°±²⍝Ḅ´µx¶᪷⚪§(20-3x)(8-2x)=102,8=1,%2=g(1ᔠ⚪§£¤).°±²⍝Ḅ´µ1¶.ூ8᪆௃᪷·AḄ☢¹E102º~¶ᑡIᐗ~78ᓽ:.;⚪ὃ>Iᐗ~Ḅ»ᵨᑭᵨ)ᙽ·AḄ☢¹½E102rH223T8⚪ᐵU.21.ூᫀ௃8(1)!ᦪy=-x2+bx+c%yjḄ+(0,3),ᑣy=-x2+bx+3,AḄᙶ᪗ᐭ¿30=-l-b+3,8b=2,ᦑbᱥ&Ḅ⊤Á3y=-x2+2x+3(2)y=-x2+2x+3=—x2+2x—1+4=—(x—I)2+4,ᦑP(l,4)X(3)y——x2+2x+3,Ây=0,ᑣÃ=-1ᡈ3,Äx=-2my=—4-4+3=-5,ᦑÄI2ḄTbᱥ&%xjḄ+⌕ὃ>!ᦪ#$¿Ḅᙶ᪗ᱯÉ⌕7ÊËÌÍ

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PEC=90°,••
CPE=30°,Z.PCE=60°,LACP=Z.CAP=75°,•KACE=15°,ᵫ(1)&'PA=8V3,•EC=^PA=4^3,11S&PAC——■PA-CE=—x8V3x4>/3=48.᝞2-2#4P=AC$vCA=CB,AACB=90°,AB=12,•••AC=BC=6VL•••PA—AC-6V2,CE=-PA=3V2,21111S4PAe=2'PA,CE=—x6v2xv2=18.()ᡠ+,-ᩩ/ḄPACḄ☢2348ᡈ18.ᦑ6ᫀ348ᡈ18.(1)᝞181APH,89=30",:;AH,PH,8”ᓽ&=>?⚪.(2)᝞1BBKJ.CEK.89BHEKA;EK==PH,BK=EH,89AECBACKBQ44S),A;4E=CK,CE=BK=EH,AE+PH=CK+EK=EC,&CDE.(3)ᑖGHIJ᝞2-1#P4=PC$᝞2-2#4P="$ᑖL:=ᓽ&=>?⚪.M⚪NOP(ᔠ⚪ὃSTUῪWPOPḄឋYᐰUOPḄᑨ\]ឋY=16⚓ᐳ18⚓

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4(y=-x+2(2)ὶxyz{1j2(y=*=CᡈtJ|,஺(-2,1),D(4,4),PPG஻yoCOG,vV4),+***PG=-1+2—24S^PCD=3X6X+2-12)=J(t-1)2+,.•.#t=l$SAPCDᨬᜧ3$P(l,»বP(t,?2),E(X[,)/(%2,)(12ὶxyz{[y=z“2ly=kx4-2᦮ᳮCX2-4/C%-8=0,•/+%2=4k,•=-8,WiPEḄ=᪆3y=kx+b,tk+b=kx+b=r/c=i(t+%1)=Cb=——tx1•y=[(t+%!)%—1tX,1ᳮ&:WiPFḄ=᪆3y="(t+x)x-tx>22(-2)N(,-2),t42-8QM=QN=t+%2Cl4cz8tX-8-t2X1X2+8t(X1+X2)-648+3264•QM.QN=——2-------------=8.yyt+Xit+xt2+t(x+x')+xxt2+4kt-82i2i2

17ூ=᪆௃(1)s(2,1)uᐭy=a/,ᓽ&:=᪆;(2)PPG஻yoCQG,P(t,?2)(-2<<4),ᑣG(tgt+2),©"®=t«”17+3#t=l$SMCDᨬᜧ3°$P(l±(3)P(t,"t2),E(X13*),F(Xixj),ὶxyz{᪷¹᪷ºᦪḄᐵ2444ky=kx+2º&C.+X2=4k,xj-x=-8,ᑖL:;WiPEḄ=᪆WiḄ=᪆ᑣ&2:M©£—2),N(ÃÄ,2),ÅÆÇ&:QM•QN=8.M⚪ὃSÈÉÊᦪḄËmឋYÌÍÎÏÈÉÊᦪḄËmឋYÐ\ºᦪÑ:ÊᦪḄ=᪆ᐗÈÉyz᪷ºᦪḄᐵº=⚪Ḅᐵ`.18⚓ᐳ18⚓