2022-2023学年吉林省长春市九台区数学九年级上册期末调研模拟试题含解析

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2022-2023
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16ZBAE=ZCAB/.'ABE^AACB.EB_AE.*.CB=2AB(3)ßvBDàAC8Q,á8AâAK±BD8KVAD=ABDK=-BD2ZAKD=90°,:AB=AD=-BC2.AD_DKVAD/7BCAZADK=ZDBCAAADK^ADBC:.ZBDC=ZAKD=90°VDF=FCAZFDC=ZDFCVZBDC=90°ZFDC+ZQDF=90°ZDQF+ZDCF=90°ADF=FQAD=aADF=FC=QF=kaVAD/7BC

17...NDAQ=NQCBZADQ=ZQBC.,.uAQD^ACQB.A஺_1_QA"'~BC~2~~CQ.,.AQ=ka=QF=CFAC=3kaVAABE^AACB.AE_ABCAB=yj3ka+ᳮAAFDS4CFGDFAF_I~FG~~FC~2...FG^-DF=-ka22AB_2)~FG~k'ூ89௃⚪⍝ᐵØÙḄ½ᔠ⚪ÃPQᜧ᪷"⚪Ãâ(ᔠ〉Ḅæçh:⚪ḄᐵIÀ:⚪è◤⌕ëḄᦪÛÞᔠḄìÑBëḄíì.1Qloc2022ஹ(1)P(2,3),y=--x+3(2)î᜜(3)ᙠfḄ.Jð-3ᡈᳮᵫÎ᪆AC237ூᑖ᪆௃(1)ᵫfᱥh(8c,P,AḄᙶ᪗ᵨñ\ᦪ^(uhACḄ᪆A84422(2)ᙠOC[8”(0,-),ßv“RAH,(ḄQÔAHOfsòóoc,ô(//F=-CF,ᵫ333=AF+HF>AH,ᓽ(3)ᐜ(õÛḄYöáAARMs'AC஺ËØᐵhᵨÆ/Ḅ?ᦪA⊤ù(ᩭᑖÚ©ª«®ûü&|NORP=90஺'|/ó஺ý=90஺'|NO'PR=90஺'ᑖþ᪀⌼
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]⚪Ḅᐵ_.23ஹপᵬஹcdEefᜩhiᡂkᓄḄ☢nᑖp]100஻/ஹ50஻Jo(2)y=-2x+48oবr᣸ᵬetd18ᜩce

21ïð12ᜩïðñòᵨᨬóᨬóòᵨ12.3ôᐗ.ூᑖ᪆௃(1)©õðöᜩ÷øᡂùᓄḄ☢ü)஺m2,᪷dᙠýþøᡂ☢ü400m2ÿḄᓄᵬᵨ4ᜩᑡ(2)᪷⚪ᑮ100x+50y=2400,᦮ᳮ'y=-2x+48,ᓽ+,(3)᪷ᵬ./0Ḅ1ᜩᦪ34530ᜩᑮx218,6/017ᵨ8wᐗ᪷⚪';=0.55x+0.2y=0.15x+9.6,᪷@ABᦪḄឋDᓽ+,.ூF௃(1)60HᜩIJᡂᓄ☢MNam?,…ST400400᪷⚪'---------=4,a2a'a=50,UVWa=50NXḄᑣᵬ0HᜩIJᡂᓄḄ☢MN50x2=100m2,'ᵬஹ0HᜩIJᡂᓄḄ☢Mᑖ\N100,]ஹ50᪷2(2)᪷⚪'100x+50y=2400,᦮ᳮ'y=-2x+48,...y^xḄBᦪ᪆`8'y=-2x+48.(3)•.•ᵬ./0Ḅ1ᜩᦪ34530ᜩ/.y+x<30,*,•@2x+48+xW3(),'x218,6/017ᵨ8wᐗ᪷⚪'w=0.55x+0.2y=0.15x+9.6,...wfxḄgᜧigᜧjX=18wᨵᨬnoᨬno80.15x18+9.6=12.3pᐗq"-2x18+48=12,,'s᣸ᵬ/018ᜩ/012ᜩ/017ᵨᨬuᨬu7ᵨ812.3pᐗ.ூvw௃

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24••á=âã=äà᧕OE=20,FH-OF-OH-2/5-1åæ@ç+èJLH-UISOM-/ஹ/2--------------------------------------------------------44VEH^FP,...vP3éᔠ⌕...3ᙠvP,EHFP8.x⚪ë⌕ὃì´ABᦪíᔠ⚪⚪ᐵNᑮCḄᙶ᪗ᯠ᪷ᱥ¡5vAஹCஹDᱥ¡Ḅ᪆`.25ஹm>-1îm=l.ூᑖ᪆௃ᵫᐵ¹xḄ@ᐗ´Aï2+21@i=oᨵ.ð3¨|Ḅñᦪ᪷ᵫ@ᐗ´AḄÆò}᪷Ḅᑨ\`Ḅò+n#lîô>'!,ᓽ4-4m(-1)>1,.ð3|`Ḅöᐳᓽ8mḄ«où.ூF௃•••ᐵ¹xḄ@ᐗ´Aú2+2x-1=()ᨵ.ð3¨|Ḅñᦪ᪷m^lî4>1,ᓽ4-4m-(-1)>1,m>-1,AmḄ«où8m>-1în#l,...jm>-1în#lᐵ¹xḄ@ᐗ´Amx2+2-1=1ᨵ.ð3¨|Ḅñᦪ᪷.X26ஹ(1)জî,ঝî.(2)ýþᓄᳮᵫÿ
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௃পজa=0஺,•.•R3ABCNB=90°,:.AC=y/AB2+BC2=7(8-2)2+82=46,•"DஹEᑖ$%BCஹACḄ",cAE==275,BD=8+2=4,2.AE275>/5••---=--------BD42)+AB/7DE,..ACBC,~AE~~BD'.AE_AC_4yf5_y/5•.-----=--------------------BDBC82(2)᝞h2,0஺&<360஺,Ḅᜧ'=ᨵ?ᓄ,BDVZECD=ZACB,

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27AEV5--=—BD261275•,n==o2UᡠBDḄ-46ᡈ.