江苏省泰州市名校2021-2022学年中考猜题数学试卷含解析及点睛

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2021-2022ὃᦪᔁ
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1620ஹ(I)D(3+0,3);(II)1BB=G2,3MBND45,ᳮᵫ89᪆;(<)P(",—?I).22ூ
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௃(I)᝞@জB,CDH_LBCDH,@জ•.,AOB4X,DC/7OA,ZDCB=ZAOB=60°,ZCDB=ZA=60°,.,.CDB4X,'CB=2y[3>DH±CB,.*.CH=HB=V3DH=3,AD6-0,3
,VC,B=3,ACC-=273-3,.DD'=CC'=143-3,.♦.D'3+0,3
.$II+1BB'=V32,3MBND45,ᳮᵫY᝞@ঝB,

17|ঝVAABC^3Y.•.ZABO=60°,AZABB'=1800-ZABO=120°,VBN^NACC'Ḅ}ᑖN:.NNBB”NABB=60o=NDCB,2ADC//BN,VAB/7B,D,:.YMBND"^}YVZME'C'=ZMCE'=60°,ZNCC'=ZNC'C=60°,.,.]\1஺8h4NBB^3Y.,.MC=CE',NC=CC',•.BC=2•.•YMBN஺^.,.BB'=^B'C'=V3:
ni᝞|BP,|ঞᙠAABPᵫYᐵ]%AP

18AP=6+3=9,ᙠRtAAPDB,ᵫ[\]ᳮ",7Ap2+PD=2.^2P(ߟ,-3_).22ூa௃^⚪43cᔠ⚪,d⌕ὃghQR3Ḅᑨ]jឋl,5Ḅឋl,QmjnoḄឋl,XḄᑨ]jឋl,[\]ᳮ,9(2)Ḅᐵp43MCND4QR3,9(3)Ḅᐵp4ᑨqHA,C,Pᐳ2,APᨬᜧ.21ஹ(1)y=2x>OA=9(2)4#r],9(3)12,Esᨵ1r,12,Eᨵ2r஺ூ9᪆௃(1)vA(3,6)ᐭy=kx"NV6=3k,!.k=2,•*.y=2x.OA=.(2)4#r],ᳮᵫ᝞wY᝞x@1,yQCQG_LyzDG,QHJLxzDH.জ1QH{QM|ᔠ2,}ᯠQG{QN|ᔠ,^2Nঝ1QH{QM%|ᔠ2,VQN±QM,QGJ_QH%H,GᑖᙠxஹyzḄz,

19.".ZMQH=ZGQN,•:NQHM=NQGN=90°.'.QHM^AQGN...5ᑖ+,*••91PஹQᙠᱥj%2,ᳮK"জজ᝞x@2,ABxzDF,yFCFC_LOADC,yACAR_LxzDRVZAOD=ZBAE,AAF=OF,/.OC=AC=OA=VZARO=ZFCO=90°,ZAOR=ZFOC,/.AOR^AFOC,••9.*.OF=,.,.F(,0),B(x,),yBCBK_LARDK,ᑣAKBs/\ARF,••fᓽ,9"xi=6,X=3()*),2•B(6,2),ABK=6-3=3,AK=6-2=4,AAB=5

20$GABKᵨw☢Ḅ+41'=1«+$0
vA3,6
,F$,0
ᐭ"k=b=10,9$)*+,AB(6,2),.♦.AB=5ᙠ4ABE{OEDBVZBAE=ZBED,,ZABE+ZAEB=ZDEO+ZAEB,/.ZABE=ZDEO,VZBAE=ZEOD,.,.ABE^>AOED.OE=x,ᑣAE=-x(),ᵫAABEsaOED"()•••⚔(,)᝞x@3,

2112,OE=x=,^2Eᨵ1rN12,#rmḄḼrx,^2Eᨵ2r....12,Esᨵ1r12,Eᨵ2r22ஹ1ூ
᪆௃ᐜR¡ᦪ£Ḅ¤◀¦§£Ḅ¤¨©,Iᔠª«⚗"ᑮᓄ¯°Ḅ±²,³aḄᐭᓄ¯°Ḅ±²´©ᓽK.ூ
௃µ±="6-«6+a6=a6,1a=-12,µ±=1.ூa௃¶⚪d⌕ὃg¡ᦪ·Ḅ¤◀¦§·Ḅ¤¨©ᑣ.23ஹ(1)C;(2)100ூ
᪆௃(1)᪷¹BᦪḄ]ºᓽKCHᑨqN(2)ᐜ©H᪵¶BCX¼Ḅ0ᑖ½,Iᵨ¾ᦪ¤¦400ᓽK.ூ
௃9Y(1)ᵫ@BK¿ᦪ¹¾ᦪ40r,À20,21rᦪ¹ḄQᙳᦪ¶Âᦪ¹ḄBᦪ,À20,21rᦪ¹ḄX¼4CX¼,ᦑ¶ÄÅgB,ᵱÇḄÈÉᡂËḄBᦪᙠCX¼NᦑxᫀC.(2)400x—=100(Í)40xYδÏ᪥ÑÒ¼ᵱÇÈÉᡂË4CX¼ḄÍᦪᨵ10(1Í.ூa௃¶⚪ὃghBᦪḄGjᵨ᪵¶ᦪδ¾Óᦪ¹,ᳮ9Ôᐵ¿Õ49⚪Ḅᐵp.24ஹ(1)m=--,n=25(2)18,Wᨬᜧ=968(3)12ᜩ.2ூ
᪆௃ூᑖ᪆௃(1)᪷¹⚪(³À12ᜩḄ×ØஹÀ26ᜩḄ×ØᐭᓽK"N(2)ᙠ(DḄÙẠᑖÛ⊤Ýᑭß,àáᨬN(3)ᑖᙠ(2)BḄrâᦪäᑁàáᑭß%æD870Ḅᜩᦪ,ç(ᜩᦪ᦮ᦪ.

22ூv௃
1
12ᜩḄ32ᐗ/fᐭy=mx-76m%32=12m-76m,%m=-[,26ᜩḄ25ᐗ/ᓟfᐭy=n,ᑣn=25,ᦑᫀm=-1,n=252(2)ᵫ(1)xᜩḄ├[20+4(x-1)=4x+16,1WXV20,W=(4x+16)(--x+38-18)=-2x2+72x+320=-2(x-18)2+968,2.•.x=18W**=968,20sxs30W=(4x+16)(25-18)=28x+H2,V28>0,.WxḄᜧcᜧ.•.x=30W**=952,V968>952,.,.x=18W*ᜧ=968(3)l870,ll27¨,14.•.27—

23ூa௃¶⚪ὃgh#ÄâᦪḄᵨ,ÄâᦪḄᵨ,éê⚪(,ëì⚪BḄᦪíᐵU,¨ᵨᑖ«àáîï49⚪Ḅᐵp.