2022年四川营山县市级名校十校联考最后数学试题含解析

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17?p]q⚪«⌕ὃsḄxMᐗMu®Ḅ¯ᵨ±9²Ạ⚪´.µ¶W·⚪Ḅᐵw¸xc-X¹ᐵºḄ»¼᪛Ḅ¾᪛¿bḄᐵ.19ஹ(1)200,(2)a=0.45,b=70(3)900À.ூ᪆௃(1)᪷;“M”“I⍝”Ḅ⚣ᦪ⚣᳛UÇᦪᓽ,(2)᪷;(1)ḄÇᦪÈᔠ⚣ᦪ⚣᳛Ḅᜧ`,ᑮÈÊ(3)᪷;“ËÌÍΔÏÐḄ¸,ÑÒ-2000ÀÏÐaḄÓᦪ.ூ0௃](1)“M”⚣ᦪ30,“I⍝”⚣ᦪ10,#ὅ⚣᳛0.20,᪷;⚣ᦪḄÑÒÕY,Çᦪ=⚣ᦪ/⚣᳛=ᜐØ=2000.20(À)90(2)“ËÌÍΔ⚣ᦪ90,a=^=0.45b=200x0.35=70;(3)2000x0.45=900.ᦑ.ᫀ2(1)200,(2)a=0.45,b=70(3)900À.ூ?p௃Ù⚪Ú?ὃÛÏÐ~⚣ᦪ⚣᳛Ḅ¯ᵨ{|⚣᳛ḄÑÒÕYx⚪Ḅᐵw.20ஹ(1)ÜÝÞ᪆(2)15.ூ᪆௃(1)ᐜßàOD,᪷;ᙊᕜfᳮU-ZADB=90°,᪷;BämaឋæU-DE=BE,-NEDB=NEBD,ZODB=ZOBD,ᓽ,U-NODE=90஺᪷;ᑗḄᑨf-ᓽ,.(2)✌ᐜÜÝAC=2DE=20,ᙠRtAADCaDC=12,ëBD=x,ᙠRtABDCaBC2=x2+122,ᙠRtAABCaBC2=(x+16)2-202,,X?+122=(X+16)2-202,®ᓽ,µ·⚪.ூ0௃(1)ÜÝ]ßÈOD,VZACB=90°,.,.ZA+ZB=90°,JOD=OB,.*.ZB=ZBDO,VZADE=ZA,...NADE+NBDO=90஺.,•ZODE=90°....DEx஺஺Ḅᑗ(2)ßÈCD,VZADE=ZA,

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20REAMBF2?p]q⚪ὃsdBᐰXḄឋæᑨfஹXῪBḄឋæᑨfஹXῪBᔠMḄឋæஹB30஺ḄឋæðñfᳮòQ·ᨵ᪀ôõöÜÝ÷ACEgZkBCFxᐵw.22ஹ(1)Þ᪆(2)1ூ᪆௃(1)ᵫABḄឋæ,INA=NC=90஺ᵫ3ᢚḄឋæ,INA=NF=90஺hiᑮNF=NC,ø;AASÜÝDCE^ABFEᓽ,(2)ᵫ÷DCEgaBFE,I]EB=DE,ø;AB=4,tanNADB=',ᓽ,ᑮDC,BCḄ»ᯠúRSEDCa2ᑭᵨðñfᳮᑡ®,UBEḄ»hi,UÚýDᑖḄ☢.ூ0௃](1)•••BABCDxAB.•.ZA=ZC=90°,AB=CD,ᵫᢚý,NF=NA,BF=AB,.BF=DC,ZF=ZC=90°,JTNBEF=NDEC,.•.DCE^ABFE(2)VAB=4,tanZADB=—,2.,.AD=8=BC,CD=4,VADCE^ABFE,BE=DE,ëBE=DE=x,GHJCE=8-x,ᙠRtACDEaCE2+CD2=DE2,A(8-x)2+42=x2,x=5,.BE=5,11:.SABDE=—BExCD=—x5x4=l.22

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