安徽亳州利辛某中学2022-2023学年数学九上期末学业质量监测试题含解析

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2022-2023
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6•.•ᵫn*w!Z1=Z2=Z3=Z4=ZABE=45°/.Z.CED=N2+N3=90°,AB//CE.ZBOD=ZDCE•.•¥Ḅ=¦h1.,.ᙠECE=§+]2=/,CD=yj12+32=710CE_y/2_y[5:.cosZDCECD-Vio-5.*•cosZ.BOD=cosZ.DCE==".5ᦑ⌱!BூL௃2⚪ὃNO¥ḄឋஹḄᑨஹᳮfª┦¡ᦪ.⚪«¬〉E⚪Ḅᐵ®U¯y°7ᓄ±²³ᦪuᔠ±²Ḅpᵨ.5ஹAூᑖ᪆௃¥´Ḅ᪷ᓽ¥´Ḅµ1¶¥´·=jḄ¸wᦪḄᑭᵨ¥´Ḅ¹µ*fxᑮᐵqaḄ¥´;txaḄº(a+l)x?+x+a2—1=0h"ᐗ¼½¥´஺+1஺0ᓽaw-l.ூ+௃¿x=0Àᐭ¥´xᑮ!a2-l=0x!a=±l.(a+l)x?+x+a2—1=0h"ᐗ¼½¥´¼஺+1H0ᓽ.Â~ᡠÄa=l.ᦑ⌱A.ூL௃⚪ὃN"ᐗ¼½¥´Ḅ⚪ᐵᙠq"ᐗ¼½¥´Ḅ¥Å.6ஹAூᑖ᪆௃£X0EÆ5஺qÇ᝞nᑭᵨᑗḄឋxᑮOE_L5C,ÉÊË=O0CEË=ABEOÌ¥xÍUBE=2,NDOE=NBEO=9Q°,᧕xODFg/XEBÇᡠfᯠ᪷ᡧḄ☢ÐÑÒᑭᵨ▢

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9ூQ௃᪷⚪ÈLkVO,Qk>l.ᦑ⌱¶C.ூ·௃"⚪ὃ¹ÉÊËÌᦪḄឋ,Q⚪ᐵÍᙠ¢ÎÏÉÊËÌᦪÐ=Ñk#OḄ¤^ÒÓÔk>0,^ÒḄÕÖxᑖW×¢ஹ▲ᙠc▲ᑁyÙxḄnᜧ®Û¶ÔkVO,^ÒḄÕÖᑖW×¢¯ஹ«▲ᙠc▲ᑁyÙxḄnᜧ®nᜧ.¯ஹÜÝ⚪Þc⚪3ᑖᐳ24ᑖß11ஹÐ=2%2+4%-3ᡈ'=-2x2-4x-3.ூᑖ᪆௃ᐜNâãᐭä¶ᵫtᱥ=-21+;+èéuvê!||a|uvI»¼0,-3ᓽë0,-3ìᐭc=—3,᪷íîïx=-2=_X!ðᓽᑏ!¯ñÌᦪḄQ᪆Å.2aூQ௃Q¶AᡠXḄ¯ñÌᦪḄQ᪆Ŷy=ax2+bx+c,tᱥy=-2x2+x+6éuv.1஺1=2,a=±2,ó•.•¤¼0,-3,•c=-3,••íîïl¯1,.•Ñ——192a.•.Ô஺=2
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11□Aὃ☢-ᨬ⚪ᙊ┵Ḅ$%.14ஹ(3,7)ூᑖ᪆௃ᵫ*ᱥ,-᪆./012ᫀ.ூ4-௃Vy=4(x-3)2+7,5⚔ᙶ᪗9(3,7),ᦑ2ᫀ9(3,7).15ஹx(x+4)(x-4).ூ-᪆௃ᐜ<=X,>?X஺A16=4?ᑖBᑏᡂEᐰGḄH.>ᑭᵨGKL.MNO.ᑖ-ᓽ/.-P.=x(x2-16)=x(x+4)(x-4),ᦑ2ᫀ9x(x+4)(x-4).16ஹ(9,0)ூ4-௃᪷RSTUHḄVWXYAA,BBZ[\]^(9,0),ᡠ`STabḄᙶ᪗9(9,0).ᦑ2ᫀ9(9,0).11109876543219nHi1217ஹ24ூᑖ᪆௃᪷R⚪cdUᙊbPᙠAA8CᑁᡠgᑮiḄjk9AEFG,ᐜ0lABḄ\[\BE]AC^HmHM1.AB^M,᪷RᙊḄឋo/pBHᑖNABC,ᦑCH=HM,qCH=x=HM,᪷RRtaAMHaᑭᵨrsVᳮ0lxḄumEK_LBC^KᑭᵨBEKSABHC,0lBKḄ\ᓽ/0lEFḄ\>᪷RvEFGs/^BCA0lFG,ᓽ/0lAEFGḄ☢w.ூ4-௃᝞Uᵫ⚪cOᡠgᑮiḄjkyEFG,XYBE,[\BE]AC^HmHM_LAB^M,EK±BC

12/K,&FJ_LBC/J.VZC=90°,AC=n,BC=9,.,.AB=7i22+92=15᪷zᙊḄឋBHqᑖNABC.•.ᦑCH=HM,uCH=x=HM,0JAH=12-x,BM=BC=9,/.AM=15-9=6ᙠRt^AMH*AH2=HM2+AM2ᓽAH2=HM2+AM2(12-x)2=x2+62#rx=4.5VEK/7AC,/.BEK^ABHC,EKBK1BKan.——=Q,ᓽQ=——HCBC4.59.♦.BK=2,EF=KJ=BC-BK-JC=9-2-1=6,•.•EG஻AB,EF஻AC,FG஻BC,.*.ZEGF=ZABC,ZFEG=ZCAB,.,.EFG^>AACB,^FGGFG=BCAC912#rFG=8ᙊFᙠAABCᑁᡠᑮḄḄ☢dFGxEF=Lx8x6=24,22ᦑᫀd24.ூ+8௃9⚪⌕ὃ¡¢£R3SḄᑨ¥ឋ¦ᔠ#⚪Ḅᐵ©^ªᳮஹ¢£R3SḄᑨ¥ឋ.

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16/.AD=DC.VAO=OB,DO஻BC.VDE±BC,.•.DE±OD,VOD9zDEy(DOᑗ,.(2)XYOG,VDG±AB,OB|ᙊbO,...}BG=MBD.VNA=35஺.*.ZBOD=2ZA=70o..,.ZBOG=ZBOD=70°.ZGOD=140°.~}DGḄ\y%5=.23ஹ5ூᑖ᪆௃mOCJ_AB^C᪷RᚖVᳮ/1ACஹCPḄ\ᙠRtZXOCAARtZ^OCPaᵨrsVᳮᑖB0lOCஹOPḄ\ᓽ/%1cos/PḄu.ூ4-௃-mOCLAB^C᪷RᚖVᳮAC=BC=4cm,.,.CP=4+2=6cm,ᙠRtZ\OCAa᪷RrsVᳮ1OC=JOA2-cA2=J52-42=3cmᙠRtAOCPa᪷RrsVᳮ1OP=Joe?+CP?="+6?=3cmᦑ3஽==5=P035ூ௃

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ᩩḄᚖᑖ,Ḅ]ᓽ9ᙊb./ஹ1152530,511ஹ25ஹ(1)(2"=5ªᜩবᱏ®ூ-᪆௃(1)Yᑭᵨ¯V°ᦪ²05³´ᦪ-᪆.1lᓽ/(2)ᑖ¡:জ¶BM=BN·,ᓽ5-t=tঝ¶BM=NM=5-t·|MmME±OB,O9AO_LBO,ᡠ`ME஻AO,Z?MBE|[/1¸-=——ᓽ/-2ঞ¶BE=MN=t·|EmEF_LBM^F,ᡠ`BF=—BM=—(5-t),᧕¼BABO22

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