4月山东省莒县2022-2023学年数学九上期末监测模拟试题含解析

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2022-2023
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A.y——(x+2)~—3B.y=(x+2)2+3C.y——(JC-2)~+3D.y=(x-2)2-35,µᑡ½¾¿ÀḄ.

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2C.8D.1011.᝞¡¢5ABCDNA=90஺AB=8,AD=6,NM,NᑖÁ«§ÂBC,ABḄTNÃÄNÅNM]¨NBÆᔠNE,FᑖÁ«DM,MNḄNᑣEF´ªḄᨬᜧÊ«A.8B.6C.4D.512.ËᐝÍζÏᐵÑÒÓÔḄªᦪyª¨Ôᱏᯖ×xØḄJ2ᦪÙ᝞µ⊤.᪷Ù⊤ᦪÙÛ¶yᐵxḄ¸ᦪ⊤º»«ÑÒÓÔḄªᦪyª2002504005001000Ôᱏᯖ×XØ0.500.400.250.200.10ஹ%Ü⚪E⚪4ᑖᐳ24ᑖ13.᝞ᙠABCZABC=90°,AB=6,BC=4,PABCḄÆÝÞBP,CP,ᑣABPCḄ☢à«14.ág=2=£,âa+/?+c=36,ᑣa—%cḄÊ____.23415.áᐵxḄæçkx2+2x-l=0ᨵèᦪ᪷ᑣkḄÊê16.ëìí¸ᦪy=Ḅîᙠïî▲.x17.ᐗòæçx2-4=0Ḅó.18.áN
—2,mᙠëìí¸ᦪy=2Ḅôᑣõ=.xஹó⚪ᐳ78ᑖ19.
8ᑖ÷ø:᝞ú5ABCONE,FᑖÁᙠA3,AD¢û=AF,ÞCE,CFZAEC=ZAFC.

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=—.n2ஹCூ|᪆௃VZACB=90°,CD±AB,/.ABC^AACD,ACDsCBD,ABC^CBD,ᡠᨵ½VÔ½ÕÖ.ᦑ⌱C.3ஹC

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8=9
°,×N3CD=120°,ᦑNDW=60°,ᡠN஺Ø4=30°×ÙPOᑗ,ᑭᵨᑗᙊḄᐵÜᓽÝtÂÃ.ூ²|௃|³BD,VZDAB=180°-NC=60°,TAB©ZADB=90°,©ZABD=90°-NDAB=30஺VPDᑗ.*.ZADP=ZABD=30°,ᦑ⌱C.ூÆ௃⚪ὃÊLᙊᑁßàÖḄឋáVᙊᕜÕª$ÕãᑗÕᳮãᑗÕª$åᡠᜳḄçVḄᙊᕜÕo|.4ஹAூᑖ᪆௃ᐜéêᱥy=x2Ḅ⚔ᙶ᪗0,0,ï᪷ñòḄóôÝᑮ0,0òöᡠÝV÷Ḅᙶ᪗
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x+22-1.ᦑ⌱A.5ஹCூ᪆௃⚪᪆A.“!1"#ἠ%&ᝄ”)*+,-./┯12B.“ᭆ᳛0.0001Ḅ-.”)*+,-./┯12C.“56789:;

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8ᡠd2x+y=0,x+2=0ᡠdx=-2,y=-4ᡠdy=(.4)-2=16ᦑ⌱AூO௃ὃ᪶ÛÜOÒ}ᑖÝᵨ.ᮣßà⚗Ò}ᑖ7ᐵÉ.10ஹCூᑖ᪆௃ᑖA87Ὺj᪷Cãä¨᪀åRSbæe§;4ஹ8⚔OÆḄ⚔O´µᓽ¹½ᑮÇῪ³J§487èÑj᪷CkxᚖIGᑖkyḄOᑮkxZéOḄÄÅÆÇ48ᚖIGᑖkyḄäOê¹dzwOC,ᯠìÆtᓽ¹½.ூº௃᝞ᑖíîজ48wÇῪAA8CḄèÑjïᔠᩩðḄCOᨵ4bঝABwÇῪAABCᐸAḄSᩩῪjïᔠᩩðḄCOᨵ4b.ᦑ⌱C.ூO௃È⚪ὃÇῪ³J§Ḅᑨ¯⚪ḄᐵÉ7ÌÍÇῪ³J§Ḅᑨ¯ᑖíîñ.11,Dூᑖ᪆௃᪷C³J§Aòk¯ᳮ¹ÛEF=DN,RDNḄᨬᜧ4ᓽ¹.ூº௃᝞´¨DN,BVDE=EM,FN=FM,

9.,.EF=—DN,2|ON;OBóᔠjDNḄ4ᨬᜧᓽEFᨬᜧᙠRtz^ABDAVZA=90°,AD=6,AB=8,•••BD=>JAD2+AB2=V82+62=10/.,.EFḄᨬᜧ4=LBD=1.2ᦑ⌱D.ூO௃È⚪ὃ$³J§Aòk¯ᳮஹ¶·¯ᳮÇÛÜ⚪ḄᐵÉ7Aòk¯ᳮḄᮣß=ᵨô¥ᓄḄª«õiAὃöὃ⚪÷.12ஹAூᑖ᪆௃IµᑭᵨùÛᦪC¹½xy=100,"ú½Rᫀ.ூº௃ᵫ⊤äAᦪC¹½xy=100,ᦑyᐵixḄᦪ⊤û}wy=—.xᦑ⌱A.ூO௃⚪ü⌕ὃ$þÿ
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102ᑣABPCḄ☢j=-4BECḄ☢j=1,3ᦑkᫀLᜓnopᑮ⚔Ḅstuopᑮv&Ḅstwx21,yzZAABC,EஹF)AB,ACḄ&.ECஹFB{AG.VAE=BE,EH/7BF,AAH=HF=—AF,2XVAF=CF,AHF=LCF,2AHFCF=—,2VEH/7BF,AEGCG=HFCF=L,2AEG=LCG.2ூ|௃}⚪ὃopḄᭆ?ឋI:;<Ḅop):;<:ᩩ&Ḅ{/opᑮ⚔Ḅst)=ᑮv&ḄstḄ2.14ஹ-202ூᑖ᪆௃ᵫxyḄឋIᑮ=:w:/`a?b+cḄ/ᯠᐭ/ᓽ+ᑮkᫀ.22+3+4ூa௃@=2=£,a+b+c=36,234aa+b+ca+b+c36”-=-------=---------=—=4,22+3+499a=8,Z?+c=36—8=28,J.a-b-c=a-(b+c)=8-2S=-20ᦑkᫀ-20.ூ|௃

11⚪ὃxyḄឋI/⚪Ḅᐵ)xyḄឋI/EFᑮa=8,b+c=2S.15ஹk-lூ᪆௃✌ᐜ=0/¡¢)8ᐗ8O¡¢/ᨵ¥ᦪ᪷/R஺0/ᑭᵨ᪷Ḅᑨª«=b2-4ac=4+4Q0,¬ὅ®ᔠkᫀᓽ+.ூa௃=0/¡¢)8ᐗ8O¡¢2%-1=0,x=1,¡¢ᨵ¥ᦪ᪷2ᦇ*0/¡¢)8ᐗO¡¢/A=2-4ac=4+4%20,²ߟ1ᦇ஺0.´Rᡠµ/ᐵAxḄ¡¢¶2+2x-1=·¸ᨵ¥ᦪ᪷/ᑣᦇḄ¹»)ᦇNT.ᦑᫀki—1.ூ|௃ὃ8ᐗO¡¢᪷Ḅᑨª/n6ᑖ¾¿Àᙠ⚪&Ḅᵨ/*⌕Ãᶍᦇ=0ÅÆÇÈ.16ஹஹÉூ᪆௃᪷WÊxyËᦪ&k=-5}ËᦪXÌᡠᙠḄÌ▲ᓽ+.ூa௃•••ÊxyËᦪy=&/k=-5<0,x,}ËᦪḄXÌᙠஹÉÌ▲/ᦑkᫀஹÉ.ூ|௃⚪ὃḄ)ÊxyËᦪXÌḄឋI/ZÊxyËᦪkVOËᦪḄXÌᙠஹÉÌ▲)k}⚪Ḅᐵ.17ஹx=+lூ᪆௃⚗8=4,:.x=±l.ᦑkᫀ)x=±l.18ஹ-1ூ᪆௃Ñ·82,Ò¸ᐭÊxyËᦪy=9,ᓽ+`mḄ.Xூa௃Ñ·82,Ó¸ᐭÊxyËᦪy=9Ó==83.ᦑkᫀ1ூ|௃⚪Ô⌕ὃÊxyËᦪXÌRḄᙶ᪗ᱯÖ/×⌕ᙠËᦪḄXÌR/%8SØÙËᦪḄ᪆

12:ஹk⚪(ᐳ78ᑖ)19ஹß᪆ூᑖ᪆௃᪷Wà<ḄឋI?ᐰ@:;<ḄᑨS?ឋIkᓽ+.ூa௃âãäåAC,᝞X/••Év

13ூᑖ᪆௃(1)h⚪jᑡlᓽ;(2)h⚪j/ᑮy=-5(x-4)2+1280x=4aᑭeᨬᜧp]^qᨬᜧᑭeᓽ.ூr௃((1)⃈t⏀vᜩḄ├]yD60+z4=60+5-(2){vᜩ├]|t⏀BḄᑭeD>ᐗᵫ⚪jy=(55—x—35)(60+5x)=—5(x—4+1280.zx=4aᑭeᨵᨬᜧᓽ]^_D51ᐗaᨵᨬᜧᑭeᨬᜧᑭeD1280ᐗ.ூ௃⚪⌕ὃ8ᐗ#+▭Ḅᵨyᐵᑡ8ᐗ#+⚪Ḅᐵ.22ஹ(1)8ᳫ28ᐗ8ᳫ60ᐗ(2)Lᡠ)ᨬ¡20ᳫ.ூᑖ᪆௃(1){8ᳫxᐗ8ᳫyᐗᵫ2ᳫ¢1ᳫᐳ◤116ᐗ3ᳫ¢2ᳫᐳ◤204ᐗ+¤ᓽ.(2){aᳫᑣᳫ(30-a)᪷§ᳫ¢¨ᳫḄ©ªᵨ-«¬1480ᐗ®-,ᐸᓽ.ூr௃(D{8ᳫxᐗ8ᳫyᐗ,2x+y=116ᵫ⚪j,3x+2y=204*x=28(ீy=60²(8ᳫ28ᐗ8ᳫ60ᐗ.(2){aᳫᑣᳫ(30-a),ᵫ⚪j60a+28(30-a)<1480,(a<20,²(Lᡠ)ᨬ¡20ᳫ.ὃ(8ᐗ8-Ḅᵨ#ᐗ8+¤Ḅᵨ.23ஹ(1)X1=3+µ,஽=3-,ফ%=4,¹=2.ூᑖ᪆௃(1)ᐜ»⚗ᯠ¾¿À'aÁÂ8⚗ᦪ8ÄḄ++ᓽ(2)ᐜÅÆ++SÇÈÉÊ»⚗ᔠÌÍpᯠ¾ÎᑭᵨÏ+ÐSÇ+ᓽ.ூr௃(প"_3x-l=0

14x2—3x-1,92X-+--1343X4Jz3IX2/BDn--143一\273/3姮或X---X-=-2222Æ+Ḅ᪷D:Ù2Ú-.-Ù2X-1-=xÙ3x+2Ú-7,—4x+1—3x?+2x—7,x~86x——8>x2-6x+9=l>ᓽ(x—3)-=1,#x—3=1ᡈx—3=-1,Æ+Ḅ᪷D(Û=4,஽=2.ூ௃Ü⚪ὃ8ᐗ#+⚪ḄᐵÝÞßàÏ+Ð8ᐗ#+.24ஹ(1)á᪆(2)AE=6ூᑖ᪆௃(Dᑭᵨᙊᕜä_ᳮᑮNACB=90஺Î᪷ᑗèḄឋêNABD=90஺ᑣNBAD+ND=90஺ᯠ¾ᑭᵨyëᣚíINBED=ND,îïᑨñBD=BE(2)ᑭᵨᙊᕜä_ᳮᑮNAFB=90஺ᑣ᪷ῪóäôḄឋêDF=EF=2,BDFs4DB,ᑡõADḄöᯠ¾÷pAD-DEᓽ.ூr௃(1)íI(TAB஺஺ḄøùZAC8=90஺#ZCAE+ZCEA=90°.VABED=ACEA,.ZCAE+ZBED^90°.VBO஺஺Ḅᑗè...ZABD=90°,:.ZBAD+ZBDA=90°.

1567AO8ᑖNC4B,:.ZCAE=ZBAD,ZBED=ZBDA,•••BD=BE;(2)-TAB஺஺Ḅ:;:.ZAFB=90°,6BE=BD,.DF=EF=-DE=2.2ᙠ'᪷>?@AᳮBF=4.,:ZD=ZD,ZBFD=ZABD=90°,.RDFs/\ADR,ᓽC2,ADBDAD545=10,:.AE^AD-DE=6.ூ%D௃E⚪ὃGHᙊᕜKAᳮஹLῪNKOḄᑨAQឋSTUVNKOḄᑨAQឋSஹᑗXḄឋS.YZ[\ᑗXḄឋSTUVNKOḄᑨAQឋS]E⚪Ḅᐵ.25ஹ(1)1(2)^_0᪆7(3)জ
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16(3)ᵫ
ᦪ_f-জ
ᦪy=x2-2|x|Ḅ_fᐵ$yghi7ঝkx>llymxḄnᜧpnᜧ7(4)জᵫ
ᦪ_f-
ᦪ_fQxgᨵ3#%ᡠhḄx2|x|=lᨵ3ᦪ᪷7ঝ᝞_•••y=x2-2|x|Ḅ_fQ:Xy=2ᨵ#%.•.xZ2|x|=2ᨵ2ᦪ᪷;ঞᵫ
ᦪ_f-•.•ᐵ$xḄx2-2|x|=aᨵ4ᦪ᪷Ḅ-l2luᐗu4u=%7k//V2luᐗax2-40¥-=ᨵ.ூᑖ᪆௃(1)জ✌ᐜ᪷>⚪%AஹBḄᙶ᪗ᯠ¢xᐭ£ᱥX᪆ᓽ*ᐸ⊤§7ঝ✌ᐜᵫ%AḄᙶ᪗:X᪆ᯠ¢%PஹQᙶ᪗᪷>8¨᪀ªᓽ*7(1)✌ᐜc=2,ᯠ¢ᵫPQḄᨬᜧ஻ᨬᜧ¬ᑭᵨ
ᦪ_fḄឋSᑖ®¯°uᐗḄᓽ*.ூ,௃(1)জ•.=5,.•.%AḄᙶ᪗{(5,0).±x=0xᐭ)%=+2,y=l....%3Ḅᙶ᪗{(0,1).±A(5,0),B(0,1)xᐭy=ax2-4ax+c,2225a-20a+c=0,Wc=2.c=2.2Q£ᱥXḄ⊤§{%=u—f+2x+2.2ঝ±A(5,0)xᐭ´=µ+2,-ᦇu·2u
ᦪḄ⊤§{¸=u·C+2.

172Ḅᙶ᪗(x,-x+2),!•.•P0஻y#2Q஺Ḅᙶ᪗(x,-1/+,x+2)2Q2PC=--X2+-X+2-(--X+2)=--%2+2x5•PQ=|,.22c8•■—x+2x=-55%&'(=1,x=42o...)x=lᡈx=4+PQ=-t5(1)ᵫ⚪./'c=20஻=y,-y-cue-4izr+c-(Ax+2)=ax2-4ax-kx,.•.//xḄ34ᦪ!“<0,•••PQ6Ḅᨬᜧ92,:.hᨬᜧ92.ᵫ34ᦪḄ:;ឋ=>/)஻=16+?ᐗ3AB?4x•-C=Dᨵ?F%a)஻>2+?ᐗ3ABG2?4H?I=஻J%)஻V2+?ᐗ3AB"2-4ᡂ:?M=NᨵOF%..ூQ௃S⚪T⌕ὃW?34ᦪX34ᦪḄYᔠ[ᵨ]^_`ᓽ>%⚪.