2022-2023学年福建省各市区数学九年级上册期末经典试题含解析

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2022-2023
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16GCூ௃⚪ὃḄYqḄឋஹḄឋஹᐰḄᑨឋY=*jஹᮣ[ᵨᐵḄឋᳮᑨᳮ3⚪Ḅᐵ.21ஹ(1)-(2)-23ூᑖ᪆௃(1)ᵨ᪗ᨵ᜻ᦪᓱᱏḄᦪ◀KᓱᱏḄᦪᓽ(2)ᑭᵨ᪛:*ᡠᨵ*Ḅᦪ*2ᓱᱏ᪗ᨵᦪᜧ5Ḅᦪᯠgᑭᵨᭆ᳛¤-UVᓽ1.2Iூ23௃3(D᪗ᨵ᜻ᦪᓱᱏḄ1ஹ3¥ᡠKា§¨ᑮ᪗ᨵ᜻ᦪᓱᱏḄᭆ᳛===A.ᦑLᫀ4—;2(2)᪛:᝞«:/K2A234134124123ᵫ:1®ᐳᨵ12¯1°Ḅᐸ±¨²Ḅ2ᓱᱏ᪗ᨵᦪᜧ5Ḅᦪᨵ4¯41ᡠK¨²Ḅ2ᓱᱏ᪗ᨵᦪᜧ5Ḅᭆ᳛=-123ூ௃⚪ὃᑭᵨ᪛:ᡈᑡ⊤ḄqS{¥Qµ¶Ḅᭆ᳛·¸ὃ⚪¹^_{3ḄqS3⚪Ḅᐵ.22ஹ(1)-x(2)j=-4x2+800x(3)᝞⌕{ᑭ»¼½38400ᐗ¿ÀÁᔆÃÄᓄÆWᧇḄᔴᦪÉÁÊᑴᙠ100ᔴÍ150ᔴÏᑁ.ூᑖ᪆௃(1)᪷'“E1ᔴᓄÆWᧇ1KNÆᡂᓄÆÒÓ0.8ᔴ”ᓽ1{*(2)᪷'ᑭ»=ÕÖᡂᓽ1{*yᐵxḄ9ᦪᐵ,-(3)ᐜ{*y=38400ᐗØxḄÙᯠg᪷'AQ9ᦪ:kḄopqᔣÚÛឋᓽ1{*xḄ²ÙÏ.ூ23௃(1)x+0.8=?xᔴᦑLᫀ4᝞ᦑLᫀ4-X;

17(2)᪷'⚪(j=x[1600-4(x-50)]--x«800=-4x2+800x,4ᑣyᐵxḄ9ᦪᐵ,-4Ü-43+800X(3)Ýy=38400Ø-4Þ2+800*=38400,x2-200x+9600=0,(x-120)(x-80)=(),x=120ᡈ80,,:-4<0,Ýj>38400Ø,803x=0ᡈ3,ᦑC(3,3),êë0Cì9ᦪQḄ5`é+P,

18RkØPA+PCḄÙᨬF4j0CḄý=ᦈ+32=30þ0Cᡠᙠÿ
y=kx0(0,0),C(3,3)ᐭ
k=Lᡠocᡠᙠ
y=xPᙠᦪCḄx=2,ᐭ
2,2Pᙶ᪗(2,2)(3)ᵫ(2)0CᡠᙠḄ⊤y=x,M!yḄ"#$0C%H,&M(x,-X2+4X),ᑣH(x,x),ᑣMH=-x?+4x-xᑣSAMOC=SAMOH+SAMCHJ33->9=_MHXxc=—(-X2+4X-x)=--X-+—X2222•••¤MOCḄ☢*+,-ᐵ%xḄ/0ᦪ123ᔣ5,ᐸ⚔9+:Ḅᨬᜧ=஺ᐸx=-2=3,?@y=22a2827SAMOCᨬᜧ=A'.

19ூE௃G⚪ὃJKLMNᦪOP᪆RὃJKSTUḄ☢*⌕WXSTUᑖᡂ[-STUP\R⌕WXPᨬᜧ=]^_%/0ᦪ.2424ஹ1
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bc40,᪷eᙊᕜTMᳮᑮAOJ_8C,᪷ejᚖ"ᑖḄឋmno\2
bc0஺᪷eSTUpqMᳮᑮO0஻AC,ᑮnors\3
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no᝞bc40,TAB+஺஺ḄJ.AD1.BC,
DC=BD,.AB=AC2
no᝞bc0஺VAO=BO,CD=DB,/஺஺+AA3CḄpq,J.OD//AC,஺EJ_AC,J.DEA.0D,.♦.OE஺0Ḅᑗ(3)'AB=AC,.4B=NC,Ḅ5,.AB=AC=U),AD4VsinB=-----=,AB5.AD=S,ACD=BD=yjAB2-AD2=6,DE4.*.sinB=sinC=-----=—CD524.DE=——5

20.OECDBூE௃G⚪ὃJḄ+ᙊᕜTMᳮஹᑗḄᑨMMᳮSTUpqMᳮᐵḄឋmMᳮᑨMMᳮ+⚪Ḅᐵ.25ஹ(2)m=2.23(2)a᪆\(3)4.3ூᑖ᪆௃(2)᪷e⊤pḄᦪe]x=5ᡈ2@=2.00,ᯠU᝞]=5A஺=7@,PD=P&=2,!PM_L43%M,ᯠ᪷eῪSTUḄឋmvwMᳮPḄᓽmḄ=;t(2)ᵨᐝḄ0bcᔜᓽ]\(3)ᵫ⚪XAO=2஺]x=2”¡⌕ᙠᦪᡝḄ£¤¥¦ᙶ᪗+§ᙶ᪗Ḅ2¨Ḅᓽ]ᯠrᔠ£ªᓽ].ூ~௃ফᵫ⊤]x=5ᡈ2@»=2.0(),᝞ᓽA஻=5@PR=2,AO?=7@PD=2,27-5APD=PD,!PMA.AB%M,ᑣDM=D2M==1,{2tᑣᙠRtAPRM,PM=722-l2=G°1.73ᓽx=6@"=2.23P(2)᝞:

21y/an(3)ᵫ⚪XAD=2PD,ᓽx=2",ᓽᙠᦪḄ£¤¥¦ᙶ᪗+§ᙶ᪗Ḅ2¨Ḅᓽ]᝞஺ḄqᓽᡠP?@®43,ᓽA64.3.ᦑªᫀ4.3.ூE௃G⚪±⌕ὃJKᦪ£Ḅ²³ஹῪSTUḄឋmஹvwMᳮᙊḄᨵᐵµx¶ᳮ⚪Xஹ·⚪pḄ²³ஹ¸¹ºᵨᦪUrᔠḄ»¼
O+⚪ᐵ.26ஹ(1)2()0()ஹ800ஹ54(2)-4ூᑖ᪆௃(Dᵫ⌱⚗DḄ¿ᦪᐸᡠᓰḄÁᑖÂ]ÃJḄ¿ᦪÄÃJ¿ᦪÅÆAஹBஹDஹE⌱⚗Ḅ¿ᦪᓽC⌱⚗Ḅ¿ᦪPB⌱⚗ᓰÄÃJ¿ᦪḄÁᑖÂÇÈ360ÉᓽB⚗ÊḄᡧUᙊÌTÉᦪ\(2)ᵨᑡ⊤Oᑡᡠᨵ]ÎÏḄÐÑÇ᪷eᭆ᳛ÔPᓽ].ூ~௃(1)G0ÃJḄÄ¿ᦪ500+25%=2000¿\C⌱⚗Ḅ¿ᦪ2000-(100+300+500+300)=800300¿\ᡧUÕ{p8⚗ÊḄᡧUᙊÌT+360°x=54°2000(2)ᑡ⊤᝞5:ABCD

22A(A4)(×4)(C,A)(D,A)B(A8)(B,8)(C,B)0B)C(A,C)(B,C)(C,C)(20DA,஺Ø(B,D)(C,D)0D)ᵫ⊤]ᐳᨵ16Ú]ÎrÛᐸpᵬஹÝ[¿ាß⌱àá,Ú$âãᐹåḄrÛᨵ4ÚᡠᵬஹÝ[¿ាß⌱41àá,Ú$âãᐹåḄᭆ᳛7=i.164ூE௃G⚪ὃJK᪵Gç{Äèᑡ⊤Oᡈ᪛êOPᭆ᳛+ᦪeᭆ᳛Ḅëᔠ⚪ᮣíḄᩩUÕ{ᡧUÕ{pḄᦪeᐵὶ+1Ḅᐵ¸¹Ḅᵨᑡ⊤ᡈ᪛êᑡᡠᨵ]ÎÐÑ+Pᭆ᳛Ḅᐵ.