河南省郑州市2022-2023学年九年级上学期开学学情调研数学试题

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17ᡠ◤×ᵨ”ᐗ*=Mr.ᐸæᦪDç᝞Dᡠè.1éw6Ḅº,-êëḄì▭}îM2ᡭᢚðḄÕÖᏉÄ×ᵨwéḄ;3ÛñòÊËóôCᑜᨣ¿ðö÷ÅÆÇᏉÄ8Ö³⌱2øᫀᡠ◤×ᵨqù,-ᳮᵫ.ூᑖ᪆௃1ús0,30,10,180ûᐭyi=Mx+b,ᑮᐵḄᐗᓽ2᪷ᫀᏉ!ᵨᢥ$ᢚ&'ᡭᢚ)ḄᏉ!ᵨ*᪷ᫀᏉ!ᵨᢥ+ᢚ&',Ḅ-:30x=8ᑖ56ᐭ”ஹᡝᐵxḄ;ᦪ᪆>?@ᓽ.ூC௃E1ḄHIJK0,30,10,180,M=15b=30h=15⊤QḄR▭TUVEWXYZ[ᨣ]^_ᓱaᏉ!ᵨb15ᐗ6=30⊤QḄR▭TUVEWXYZ[ᨣ]^_ᓱḄ!ᵨb30ᐗ2ᵫ⚪Tᡭᢚ)ḄᏉ!ᵨb15+0.6=25ᐗfijQ=25X0.8=203⌱lᫀᡠ◤!ᵨop.ᳮᵫ᝞sEᵫ⚪Ttyi=15x+30,y2—20x.vᏉ8w⌱lᫀᡠ◤!ᵨEyi=15X8+30=150ᐗ⌱lᫀᡠ◤!ᵨE*=20X8=160ᐗV150<160,⌱lᫀᡠ◤!ᵨop.ூK{௃|⚪ὃ~;ᦪḄᵨ⚪ḄᐵVᳮ&'ᫀ,“ஹ”ᐵxḄ;ᦪ᪆>.20.]ᦻᐹ◤⌕Wᢇ2Bᓱ0.5mm⁐tᵨ600ᐗW

18ᵨ400ᐗWḄᦪ?1ᐗ.(1)£Ḅᑖ5V¤pᐗ¥(2)¦ᖪ¨ᑜWḄᦪ?ᦪḄ2ª«¤60Ḅ¬ᦪ®J360¯°ᑁ²³(᝞sᡠQ).¦ᖪ᝞´µ᣸·¸¹ºᑭ¼ᨬᜧ¥ᨬᜧᑭ¼V¤p¥b]¿ÀÁ2Bᓱ4ᐗ/0.5mm⁐2.5ᐗ/ூᑖ᪆௃(1)Ã0.5஻”"⁐Ḅbxᐗᑣ2BᓱḄb(x+1)ᐗᑭᵨᦪ=¬+ᓫÉᔠᵨ600ᐗWᵨ400ᐗWḄᦪᓽ,ᐵxḄᑖ>ËÌÍÎaᓽ,0.5஻஻"⁐Ḅ*0ᐸ6ᐭ(x+1)Ðᓽ,2BᓱḄ(2)ÃW"2BᓱᑣW(2,”+60)0.5஻஻"⁐᪷WḄ¬ᦪ®J360ᓽ,ᐵ᪷ḄᐗÑ>Ëᓽ,mḄÓ-ÕÃWḄ£ᢇᐰׯ,aØḄ¬ᑭ¼bwᐗᑭᵨ¬ᑭ¼=Ḅ├¯ᑭ¼X├¯ᦪ(Wᦪ)ᓽ,wᐵ஻Ḅ;ᦪᐵÛ>*ᑭᵨ;ᦪḄឋÝᓽÞᨬ-ß⚪.ூC௃E(1)Ã0.5mm⁐Ḅbxᐗ,ᑣ2BᓱḄb(x+1)ᐗà⚪TE᧵=%x+1XEx=2,ÌÍÎx=2VãḄäᔠ⚪Tx+l=2+l=3.CE28ᓱḄb3ᐗ0.5mm⁐Ḅb2ᐗ.(2)ÃWæ23ᓱ,ᑣW(2m+60)0.5/஻"?⁐à⚪TEᔊ+2m+60W360,EmW100.ÃWḄ£ᢇᐰׯ,aØḄ¬ᑭ¼bwᐗ,ᑣw=(4-3)(2.5-2)(2m+60)=2//?+30,V2>0,

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