2022-2023学年浙江省吴兴区七校联考数学八年级上册期末统考模拟试题含解析

《2022-2023学年浙江省吴兴区七校联考数学八年级上册期末统考模拟试题含解析》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

2022-2023
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19:.OM=ON,:.ZMCO=ZBCO=45°,•*BFLBC,:.ZCBF=90°,:.ZCFB=45°,28BK_LCF¨K,îNBKF=90°,KF=KC,NKBF=4KBe=45°,:.KF=KC=KB,•*OF=-CF,:.OF=BK,2ZAOF+ZFOB=ZFOB+AKBO=90°,ZAOF=ZOBK,-.OA=OB,*.4AOF/40BK(SAS),*,ZAFO=ZBKO=90°,*.ZAFC=90஺,NE4C=45஺2ï6஺4஺¨஺î4஺=஺஺,49=/6஺=45஺:.FQ=FB=CQ=BC,BCAC=V10.2ூ23௃4⚪DI☢£ᙶ᪗-ñòÉ⌕ὃ67ÛÜᦪḄឋ°ஹᐰ§Ḅᑨp³ឋ°ஹIᑖÅḄᑨp³ឋ°ஹ§Ὺ£Ḅᑨp³ឋ°§±óᔠឋôஹõ¢öᜧ,÷¨®ᔁḄùÆ⚪úûÊËÅஹᮣýᵨᐰ§³§Ὺ£Ḅᑨp³ឋ°⚪Ḅᐵ.22ஹ1þBÿ
ᓄᘤஹA
ᓄᘤḄᑖ1200ᐗ1500ᐗ2ᨵᫀB
ᓄᘤ7Aᓄᘤ21B
ᓄᘤ8Aᓄᘤ24.ூᑖ᪆௃পB
ᓄᘤxᐗ,Aᓄᘤx+300ᐗ,ᵫ⚪"#60007500%,-----=--------()*%;xx+300
2B
ᓄᘤx,Aᓄᘤ3xᵫ⚪"%

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ᓄᘤஹA
ᓄᘤḄᑖ1200ᐗ,1500ᐗ;(2)B
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ᓄᘤ7,Aᓄᘤ21;B
ᓄᘤ8,Aᓄᘤ24.ூCD௃ὃ᪶GHC:ᑖ/)Iᵨ.ᳮ(⚪ᑡMᑖ/)NO-./ᑖ᪆ᫀ4ᐵQ.23ஹ(1)-18;(2)ᨵᨬᜧAᨬᜧA32.ூᑖ᪆௃(1)T᯿▅Wᩞᧇஹᑭᵨ[\]5/ᓄ^ᐰ`/abcᦪḄdḄe/᪷fᏔhḄijឋ(8(2)ᑭᵨ[\]5/lme᪷fᏔhḄijឋ(8ᓽ*.ூ0(௃((1)Vx2+10x+7=x2+10%+25-18=(x+5)2-18,ᵫ(o+5q>0,%(X+5)2-18>-18zrᦪ//+10s+7ḄᨬtA4b18z(2)-42-8஽+16=-஺2-8஺-16+32=-(“+4w+32,V-(a+4)2<0,.•.-(a+4)2+32<32,xrᦪ/-ᱏߟ8a+16ᨵᨬᜧAᨬᜧA32.ூCD௃

21{⚪ὃ|Ḅ4[\ḄIᵨdᏔhḄijឋ}~[\ḄbஹᏔhḄijឋ4(⚪ḄᐵQ.24ஹ(1)ᵬ`ᙳᦪ1()()ஹᦪ100ஹᦪ10()`ᙳᦪ100ஹᦪ4100ஹḄᦪ4100;(2)⌱ᵬᒹᔠ〉.ூᑖ᪆௃(1)᪷f`ᙳᦪ4ᢣᙠbᦪfᡠᨵᦪfd◀=ᦪfḄcᦪbᦪfMhᦪᨬḄᦪfᦪbᦪfᢥ᯿tᑮᜧ(ᡈᜧᑮt)Ḅ¡᣸ᑡ᝞¤ᦪfḄcᦪ4᜻ᦪᑣᜐ§¨©Ḅᦪª4«ᦪfḄᦪ.᝞¤«ᦪfḄcᦪ4Ꮤᦪᑣ¨cᦪfḄ`ᙳᦪª4«ᦪfḄᦪl¬ᓽ*.(2)ᑭᵨ®¯/ᑖ¬MᵬஹḄ®ᯠ±*%8ᫀ.ூ0(௃((1)ᵬḄ`ᙳᦪ(101+102+99+100+98+103+100+98+100+99)=100Ḅ`ᙳᦪ^(100+101+100+98+101+97+100+98+103+102)=100ᵬᦪftᑮᜧ᣸ᑡ98,98,99,99,100,100,100,101,102,103ᦑᵬḄᦪ4100,ᵬḄᦪ4ᦪ0,ᦪftᑮᜧ᣸ᑡ97,98,98,100,100,100,101,101,102,103ᦑḄᦪ4100,Ḅᦪ4100(2)ᵬḄ®5,|,=^[(101-100)2+(102-100)2+(99-100)2+(100-100)2+(98-100)2+(103-100)2+(100-100)2+(98-100)2+(100-100)2+(98-100)2)=2.4Ḅ®='[(100-100)2+(101-100)2+(100-100)2+(98-100)2+(101-100)2+(97-100)2+(100-100)2+(98-100)2+(103-100)2+(102-100)2]=3.2,

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