河南省新乡2021-2022学年中考数学模拟试卷（一模）含解析版

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⚗ᡭẚ௃ᓭḕ2021-2022ὃᦪᔁᔁ᱐ஹ⌱⌱ᜧ⚪ᐳ10⚪ᐳ30ᑖ1.%ᐗ'()*2m+6x2+m2-9=0Ḅ5ᦪ⚗60,ᑣm9:A.-3B.3C.±3D.92.AᑡᡠDEFG6HIEFJ6KHIEFḄ6A.LMNFB.NC.L)FD.LOPF3.QRSTᨵ3QVᳫX2QYᳫZ[ᳫḄ᜜Fஹᜧஹ]ᙢ_ᐰabᙠdeᑮᳫḄᩩhAijkR᥎m2Qᳫᐸ2Qᳫo⁐eabḄᭆ᳛63123A.-B.-C.-D.45554.ᵨv)wx)*——10x+9=0,v)z{|A.X-52=16B.x-5}=1C.x—102=91D.x-102=1095.᝞E஺஺64ABC᜜ᙊZOCB=40°,ᑣNAḄᜧ6.ᱥ=-3/|ᑮᱥy=-3x-l2-2,Aᑡ)LḄ6A.ᐜᔣ1Qᓫᔣ2QᓫB.ᐜᔣ1QᓫᔣA2QᓫCᐜᔣ1Qᓫᔣ2QᓫD.ᐜᔣ1QᓫᔣA2Qᓫ7.᝞EPAஹPB6஺OḄᩩᑗᑗᑖ6AஹB,᝞¡OP=4,PA=2G£¤¥┐59:

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6⚗cNMᦪ⚗.ᐸ3a,b,cᑖfuIJ⚗|ᦪ⚗|ᦪMᦪ⚗.2.~ᑡᡠNNḄN()A.B.C.KD.ூRᫀ௃Cூ=᪆௃ூZ=௃⌱⚗A.N.⌱⚗B.N.⌱⚗C.KNN.⌱⚗D.N.ᦑ⌱C.3.;3ᨵ3ᳫ$2ᳫlᳫḄ᜜ஹᜧFஹᙢᐰ¡ᙠ¢ᑮᳫḄᩩk~£¤¥3᥎2ᳫᐸ32ᳫ§⁐¡Ḅᭆ᳛N()3123A-B.-C.—D.-4555ூRᫀ௃Dூ=᪆௃ூZ=௃ᳫNa,b,c,ᳫNA,B,¯°Ḅ±²ᨵ(a,b),(a,c),(b,c),(A,B),(a,A),(b,A),(c,A),(a,B)(b,B),(c,B),³§⁐Ḅᨵ6µ.ᡠ¶-105ᦑ⌱D.]c(1)ᑭᵨ⚣᳛¼½¾cᜧ¿¡ÀÁÂ34ÃÄḄ⚣᳛ÅÆᙠÇMᦪp▬ÊËlMᦪPÍumAḄᭆ᳛(ᨵᑖᵨνAÃÄḄ;ᑗ⚣᳛ḄÐᙳYÒᐸᭆ᳛).(2)ÓÔ¾c᝞²ᙠÁÂ3ᨵ஻µV×Ḅ±²ØdÙÚÃÄḄV×ឋÜPÝ^Aᒹßᐸ3Ḅ¤3±²Ë4ÃÄḄᭆ᳛P(A)=;.n(3)ᑡ⊤¾cÁÂ⌕âÎã⌕äV×åḄ±²ᦪæçèéêᙢᑡ;ᑗV×Ḅ±²aMëᵨᑡ⊤¾.ᐸ3;⌕äÒì᪗í;⌕äÒᑡ᪗.(4)᪛ï¾cÁÂ⌕âÎᡈñèḄ⌕äᵨᑡ⊤¾ÍKò__éêᙢᑡ;ᑗV×Ḅ±²aMëᵨ᪛ï¾ᭆ᳛.4.ᵨóK¾=KL/;10%+9=0,óK÷VW()A.(x-5)2=16B.(x-5)2=1C.(10)2=91D.

7(x-10)2=109ூRᫀ௃Aூ=᪆௃ூZ=௃x2-10x+9=0,x2-10x+25=25-9(x-5y=16.ᦑ⌱A.5.᝞00NAABCḄ᜜úᙊZOCB=40°,ᑣNAḄᜧ()ூᫀ௃Bூ᪆௃ூ௃⚪ᑖ᪆08=0C,NOC8=40஺NBOC=180°-2ZOCB=100°,...ᵫᙊᕜ'(ᳮ*+NA=,NBOC=50஺.2ᦑ⌱B.6.01ᱥ34=-3/789ᑮ1ᱥ3y=—3(x—l)2—2,?ᑡ78ABCDEḄF()A.ᐜᔣI781JᓫLMᔣN782JᓫLB.ᐜᔣI781JᓫLMᔣ?782JᓫLC.ᐜᔣO781JᓫLMᔣN782JᓫLD.ᐜᔣO781JᓫLMᔣ?782JᓫLூᫀ௃Dூ᪆௃ூ௃01ᱥ3)=-3/78ᐜᔣO781JᓫL9ᑮ1ᱥ3Q-3(x-1)2,Mᔣ?782JᓫL9ᑮ1ᱥ3R-3(x-1)2-2.

8ᦑ⌱D.7.᝞UPAஹPBF00ḄXᩩᑗ3ᑗ[ᑖ\FAஹB,᝞]OP=4,PA=2^_`NAP3A.90°B.100°C.60°D.110°ூᫀ௃Cூ᪆௃ூ௃cos/APO="=2f=ᡠhNAPO=30°,NAQ8=60°.ᡠh⌱0.i0428.jklmnᐵpqrᢄtஹqrᢄtḄuvwxhᩭzt{ᡝ2014}~ᙳ2620ᐗᢄᑮ2016}~ᙳ3850ᐗt{ᡝ}Ḅ7ᙳ᳛x,ᑣN☢ᑡḄACDEḄF()A.2620(1-x)2=3850B.2620(1+x)=3850C.2620(l+2x)=3850D.2620(1+x)2=3850ூᫀ௃Dூ᪆௃ூ௃⚪᪆᝞]t{ᡝ}Ḅ7ᙳ᳛X_`᪷⚪92620(1+4ᑡA2620(1+x)2=3850.ᦑ⌱D.9.᝞Uᵨᢗ¡U┑Ḅz£¤¥Ḅ¦].¬£N☢ᨵ¨J©ª:

9জ¯ᢗ£ᦪF500±²³“┑µᔣN”Ḅ£ᦪF308,ᡠh“┑µᔣN”Ḅᭆ᳛F0.616¸ঝḼ¤¥£ᦪḄ»¼“┑µᔣN”Ḅ⚣᳛¾ᙠ0.618▬Á᤮Ã(ḄÄÃឋ*hÆ“┑µᔣN”Ḅᭆ᳛F0.618¸ঞÈM£ᵨɤ¥ᑣ¯ᢗ£ᦪ1000±“┑µᔣN”Ḅ⚣᳛(F0.620.ᐸCᔠᳮḄF()A.জB.ঝC.জঝD.জঞூᫀ௃Bூ᪆௃ூ௃জ¯⚣ᦪᜧ±⚣᳛⌲ÍÄÃḄÎᓽᭆ᳛500£Ḅ¤¥£ᦪÐÑÒ⚣᳛ÄÃᙠ0.618,┯Ô¸ঝᵫU*+⚣ᦪÄÃᙠ0.618,ᡠhÆ⚣᳛0.618,DE¸ঞ.ÕJ¤¥FJ¤¥¯ᢗ£ᦪ1000±┑µᔣN”Ḅᭆ᳛Ö(F0.620.┯Ôᦑ⌱B.ூ[×௃Ø⚪ὃÚᑭᵨ⚣᳛Æᭆ᳛ÜDEᳮÝᐵᭆÞF⚪Ḅᐵß.1010.᝞UFà£áᦪâ=h2+ã+h஺஺0)UäḄwᑖåæç,=ὡé[(2,0)?ᑡêãজabcvO¸ঝ-2b+c=0¸ঞ4a+2b+c<0¸টÈ(-g,yi),(g,y2)F1ᱥ3NḄX[ᑣyim(am+b)ᐸC(m4§)ᐸCêEḄF()B.ঞটC.জঞD.জঝঠூᫀ௃Aூ᪆௃ூ௃জᵫ1ᱥ3Ḅmí*+a<0,î1ᱥ3ïyçḄð[*+c>0,åæç---->0,2a

10Ab>0,Aabc<0,ᦑজDE¸ঝ0ñ2,0òᐭy=ax?+bx+ca^O,:.4a+2b+c=0,b1.----=,la2a=-b,:.-4b+2b+c=0,:.-2b+c=0,ᦑঝDE¸ঞᵫঝ*+4a+2b+c=0,ᦑঞ┯Ô¸টᵫp1ᱥ3ḄåæçX=y,571•ñ-õyiïI],yiᐵpöàõåæᵫpX>g±yḼxḄᜧÒ÷.75•ு
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11àஹüý⚪ñØᜧ⚪ᐳ5⚪⚪3ᑖᐳ15ᑖÿ11.ᐵxḄx2-mx+m=0ᨵᦪ᪷ᑣᦪ2m2-8m+lḄ.ூ!ᫀ௃1ூ$᪆௃ூᑖ᪆௃᪷'Ḅ(ᦪ᪷Ḅᑨ*ᓽ,-./=m2-4m=0,2ᐸᐭ2mJ8m+16ᓽ,-.78.ூ9$௃$:•.•ᐵxḄx2-mx+m=0ᨵᦪ᪷<./==-m>2-4m=m2-4m=0,.,,2m2-8m+l=2=m2-4m>+1=1.ᦑ!ᫀ:1.ூ@A௃B⚪ὃEF᪷Ḅᑨ*GHIJ“L/==>MᨵḄᦪ᪷”O$⚪ḄᐵP.12.QᱥST-f+2x+2Ḅ⚔@ᙶ᪗O.ூ!ᫀ௃=13>ூ$᪆௃ூ9$௃Z'=-x2+2x+2=-=x-1>2+3ᡠ]⚔@ᙶ᪗O=1,3>.ᦑ!ᫀ=1,3>.13.^_`ᳫ6ᨵ4bᳫ2cᳫde^_`ᳫ6ᨵ3bᳫ3cᳫᑖ*fg^h6ijᙢl.1ᳫᑣl.ḄᳫmOcᳫḄᭆ᳛O.ூ!ᫀ௃~6ூ$᪆௃2131ூ9$௃^hql.cᳫᭆ᳛O:=sde^hl.cᳫt=s,6362l.ḄᳫmOcᳫḄᭆ᳛O=326ᦑ!ᫀ614.᝞vᙠ“BC6ZC=90°,AC=BC=yf2Z2"BC~@AM┐ᔣ60஺ᑮ/ABCḄᙢCB,ᑣCB=

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