广西贵港市平南县2022-2023学年数学九年级第一学期期末教学质量检测模拟试题含解析

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2022-2023
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13=90°+90°=180°.᝞+ᵫ⚪[KZAOB=NCOD=90஺,'ZAOC=a,NBOD=0,ZAOC+4C0D+ZBOD+ZAOB=360°,:.a+/3=ZAOC+ZBOD=360°—ZAQ3+NCW=36O°-9O°-9O°=180°.Þ-ᡠß஺+Ô=180஺ᦑyᫀK«+/?=180°.ூ%௃&⚪ὃ)*¼VḄឋqᮣáâᵨ¼VḄឋq3&⚪Ḅᐵ2.18ஹ1.ூᑖ᪆௃᪷jᙊᕜn}ᳮtäᑖ᪆bᑮyᫀ.ூ<௃KVZBAC=-ZBOC,ZACB=-ZAOB,22VZBOC=2ZAOB,

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15ᦑ;ᫀ10(),30(2)⊡ᐰ⚣ᦪᑖò-lóôõ⚣ᦪᑖò-A⚣ᦪ/÷403530252015100-I----------------------------------------ôõ>cm150155160165170175çèøᔠᨬª¶é(3)᪵a*ôõû¾160cmḄ÷ᦪ15+30=45,᪵a*ôõû¾160cmḄ⚣᳛ü=0.45,ᡠ(±²yqᙢÿ
1160c஻?Ḅᭆ᳛0.45.ூ௃⚪ὃᑭᵨ⚣᳛ᭆ᳛ᵨ⚣᳛ᭆ᳛!ᑮḄ#$%&'()*ᦪḄ,-&.ᩭ.01.3ὃ45Ḅᨵᐵᭆ8.21ஹ(1)ஹ:;<=>?᪆A(2)ஹ:;<=>?᪆ூᑖ᪆௃C⚪ᑖ᪆পஹ᪷FGHᑖI!JNBAD=NDAE,KᔠNAED=NADB!JM%A(2)ஹ᪷FM%!JNᫀ.ூP?௃C⚪?᪆(1)ஹAD#NBACHᑖIZBAD=ZDAEQNAED=NADBAAABD^AADEA.ABAD,(2)ஹVAABD^AAADE,:.——=——/.AD2=ABAE.ADAEὃM%RGSḄᑨUVឋX13222ஹ(1)j=-x^+lx+lx(2)O(1,4)ᡈ(2,1)(1)Z[ᙠx]^_`2(bc)Z[ᙠx]d_`(-g,-5)ூᑖ᪆௃(l)c=l,3(1,0),e3Ḅᙶ᪗hᐭjᱥI⊤mny=ax2+2x+l,?!ᵨ-1ᓽq!JNᫀA(2)ᵫSACOF;SCOF=12!OFFD=1N2,ᵫDH//CO!COZ)M=1N2,t!DM=2,uDM=~X2+2x+3-(-x+3)=2,Aᓽqt?A(1)ᑖ[ᙠx]^_ஹ[ᙠx]d_vwxyᑖzt?ᓽq.ூP?௃প

16...CḄᙶ᪗C(0,1),c=l,5Ḅᙶ᪗B(l,0),e5Ḅᙶ᪗hᐭjᱥI⊤mny=ax2+2x+l,?!”=-1,ᦑjᱥIḄ⊤mn[-|+2*+1(2)᝞<஺O”_Lx]”5cM,SACOF:S^CDF=1:2,.OFFD=l2,'DH//CO,.CODM=OFzFD=\t2,2.DM=-CO=2,3I5cḄ⊤mny=kx+b,b=3eC(0,1),8(1,0)hᐭ!ᐭ,3k+b=Q[0=3I5cḄ⊤mny=-x+L஺Ḅᙶ᪗(x,-x2+2x+l),ᑣM(x,-x+1),I)M=-x2+2x+3-(-x+3)=2,?!x=lᡈ2,ᦑ஺Ḅᙶ᪗(1,4)ᡈ(2,1)পজZ[ᙠx]^_`OG=OE,8G,<8I[8jᱥIP,y]NGBM=NG8஺,!JNO8P=2NO8E,<GG//JL8M,᝞

17.OE=~,2■:NGBM=NGBO,GHA.BM,GOLOB,3GH=GO=OE=-,BH=BO=1,229TSC.MH=X,!|A/G=x-\—4\292+ᙠAOBM5OB^O^MB2,BP32+—3+X-427?!x=2,a553ᦑMG=JX2+-=-,1QW=MG+G0=_+_=4,V4222MḄᙶ᪗(0,4),I8MḄ⊤mny=kx+b,'3k+b^0e8(1,஺)ஹM(0,4)hᐭ!ீᓃ=4k——?!\3,_=44...I8MḄ⊤mny=--x+4,y--x2+2x+3?_=4y=——x+43

18?!x=l()ᡈg,1432ex=3hᐭj=-yx+4#j=—,132ᦑ[Ḅᙶ᪗(§,)AঝZ[ᙠx]d_`᝞<EENL5P,I[5y]M,VN0BP=2N0BE,.”E#N05[ḄHᑖI,3.EN=OE=~,BN=OB=1,2MN=x,ᑣMEZMM+EN)YᙠH/A05M5OB^O^MB2,=(x+337?!x=2,-,ijOM=ME+E0=-+-=4,222MḄᙶ᪗(0,-4),I5MḄ⊤mny=kx+b,3k+b=0e5(1,0)ஹM(0,-4)hᐭ!:

19k=—
2N3,b=-44BdbMḄ⊤hiNy=-x-4,3y=-x2+2x+3
Cj'4y=—x—4I37
2Nx=lnopqᡈ-7464ux=v§xᐭy=§1_42y=,764ᦑ{|Ḅᙶ᪗nv§,--{|Ḅᙶ᪗Nng,Ḽqᡈn-n-yq.ூ{௃5⚪ὃḄᦪḄᔠᵨᑮvᦪஹdᑖdᡂ1ᳮஹᳮஹᑖdḄឋᐸEn1q⌕ᑖ
⍡.23ஹn1qM"
᪆n2q1.ூᑖ᪆௃n1q᪷¢vᐗCj᪷Ḅᑨ¥iᓽ§2ᑮ¨©ªv33n2qᵫvᐗCj᪷¬ᦪḄᐵ2%+%,=------,-஽=-3°2ᑮᐵImḄCjᓽ§
.mmூM
௃n1q♦.,Cj᝞2+nªv3»-3=0ᐵIxḄvᐗCjµw0,VA=nm-3q2-4x"zxn-3q=nº+3>>0,µCjKᨵ½¾¿᪷n2qÀCjḄ½᪷᳝x,2m-33nilᑣ᳝+/=------x^x=-----2m-m᪷¢⚪2N———,
2NÃ=6,Ä=0nopqmm•••ªḄ<1.

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21⚪ᐵ§.1325ஹ(1)-A(2)-24ூ?᪆௃Q)᪷FqÇឋÈᨵᵱÊᡈ᝕Ê!ᑮᐸᭆ᳛A(2)ᑡJᡠᨵḄqÇឋᯠ»1UÍÎᨵÏ᝕ÊḄqÇឋᯠ»qtᭆ᳛.ூP?௃?(1)(1)СÏÊÑ#᝕ÊḄᭆ᳛=^A2ᦑNᫀ?A2(2)·᪛Óᵱ᝕ᵱ᝕ᵱ᝕ᐳᨵ4wÀqÇḄKÕᦪᐸ5ÍÎᨵÏÊÑ#᝕ÊḄKÕᦪ3,3ᡠ¢ÍÎᨵÏÊÑ#᝕ÊḄᭆ᳛=ூ௃⚪ὃᑡ⊤ÖV᪛ÓÖᑭᵨᑡ⊤Öᡈ᪛ÓÖ×ØᡠᨵÀqÇḄKÕn,Ù¯5⌱JÛᔠÜÝAᡈBḄKÕᦪÞm,ᯠ»ᑭᵨᭆ᳛ßnàÜÝAᡈÜÝBḄᭆ᳛.26ஹ(1)IáODḄâ1.(2)ãᙠDEäᢝæç.DE=$è.ூ?᪆௃C⚪ᑖ᪆(1)᝞(1),᪷FᚖªUᳮq!BD=£BC,ᯠ»È◤êᵨëìUᳮᓽqtJIáODḄâA(2)AB,᝞(2),ᵨëìUᳮqtJABḄâ᪷FᚖªUᳮq!DÁEᑖz#IáBCÁACḄ5᪷FRGS5²IUᳮíq!ᑮDE=1AB,DEäᢝæçA?(1)᝞(1),OAপ

22VOD±BC,.,.BD=-BC=-x6=3,22VZBDO=90°,OB=5,BD=3,/.OD=^O2-BD2=LBᓽdODḄÆ1.(2)ÇᙠDEÉᢝËÌ.ᳮᵫNÍÎAB,᝞(2),VZAOB=90°,OA=OB=5,,AB=VOB2+OA2=5V2»VOD±BC,OE±AC,.•.DEᑖ¥dBCACḄE{,.,.DE=-AB=-^^,22ADEÉᢝËÌ.ὃ{NᚖÐᳮÑÒEÓdᳮ.