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5(2)©CஹEª«¬ -«¬CEḄ¦᪆¨z(3)2,gABCD®«¬CE¯° ±$CE²ᔠ -¬´BDµ©Ḅ☢¶.22.ᙠᡭ·ᳫ¹ ·ᳫºv»Ḅ¼½¾¬xᡠÀḄÁᱥ¬ ÃᡠÄÅḄᙢÇxÈ0Éů☢«Êᙶ᪗ ·ᳫv̹ᙠ0dÍ1mᜐḄP.ÎÏ·ᳫ¼½¹ḄÐ7y(m)Ñ7ÒÓx(m)ÔÕÖ×ᦪ⊤Ù¨y=-1x2+x+c.(1)-yxÔÕḄᦪ⊤Ù¨z(2)ᳫᙠ¼½Ḅ©ÑrÓᙢ☢ḄÐ7z(3)ÚÌÛ©ᜮ⚔ Þß»ḄÐ7xBC=2.5m,Ú⌕ᙠ·ᳫ5á©Ñrâᑮᳫ -ÚÓḄᨬäÒÓ0B.23.åæF1,ᙠçABCèç4QEr AB=AC=AD=AE,éNBAC+ND4E=180¹ ᡃìçABCçD4Eíx“⚔⊡ïῪñÊg" ^ABCḄóBCḄЬ4MôõḄ“⚔Ò” Aôõ“ö⊡”.ᱯøÏFপᙠ2,3r çD4Eíx“⚔⊡ñÊg” AM,AN“⚔Ò”.জ2,éN8AC=90°¹ AMDEÔÕḄᦪúᐵxAM=DE-ঝ3,éNR4C=120°,BC=6¹ AN6x.üýþÿ (2)ᙠ1N84CAMOEḄᦪᐵ.ᵨ
6 34,ᙠ!"#A8CD,AD=AB,CD=BC,ZB=90°,$4=60°,CD=2,ᙠ!"#A8COḄᑁ&'ᔲ)ᙠ*P,+,-.-P8C0“⚔⊡4Ὺ6#”89)ᙠ:;aPBCḄ“⚔<=”Ḅ>?9@)ᙠ:▊ᳮᵫ.ூE⚗ᡭẚJKḕM□O2021-2022TUὃᦪTWXYᔁ[\W][^᪆᱐]aஹ⌱a⌱[dᜧ⚪ᐳ10h⚪ih⚪4ᑖkᑖ40ᑖ]1.lᑡ!nᦪḄanᦪo[]A.-38.0C.1P.KூpᫀPூ^᪆ூr^ᑖ᪆ m3.14,sᦪᜧt0,0ᜧtsᦪ.r^ ᵫtsᦪᜧt0,0ᜧtsᦪsᦪuᡠ.Ḅᦪoᐔᦑ⌱D.*y zᦪᜧh{|Ḅ}~ জ sᦪᜧt0,sᦪht0,sᦪᜧtaᑗsᦪ?ঝnsᦪᜧḄh?ঞᙠᦪ⊤Ḅᦪ"Ḅ{"Ḅᜧ.2.▾ᙢᳮ10ᨴ10tḄ“ᜩ” FASTt2017U8ᨴ22¡¢a⚩ᾭ¥¦§¨J859-0131,©ªᕜ¬1.83®¯°=±ᙢᳫ³1.6´ᐝU.1.6´ᐝUᵨT¶ᦪ⊤[]
7A.1.6x105ᐝUB.1.6xK)4ᐝUC.016x105ᐝD.16X104ᐝUூpᫀBூ^᪆ூr^ᑖ᪆ ⊤4X10"ḄÃᐸ”oÅᦪ.r^ 1.6´=1.6X10'.ᦑpᫀB.*y T¶ᦪḄ⊤ÓX10"ḄÃᐸÉ10,"ᦪ.Ë”Ḅ⌕ÍÎÏᦪÐᡂ“hᦪ*ÒÓÔÕÖ?Ḅhᦪ*ÒÓḄᦪØ.ÏᦪÙ1”osᦪ?ÏᦪḄÉ1”osᦪ.3.Û°[a-l]2ḄÞßo[]A.a2-lB.a2+lC.a2-2a+lD.a2+2a-lூpᫀCூ^᪆ூr^ᑖ᪆ ᪷®âᐰäåæÃ[4—b]2="2—2“b+%2Û°.r^ g-1]2=—2a+l.ᦑpᫀC.*y d⚪ὃìÔâᐰäæÃâᐰäæÃoᦪḄí[ᡈå]Ḅä4tïðḄäḄíñ[ᡈòó]ïðḄôõḄ2ö.4.an÷ᳫanᙊ┵ាûüᔠᙠaþᑣ ḄூᫀAூ᪆ூᑖ᪆Ḅ☢ᡠḄ.☢ᙊᳫ☢ᙊ┵"Ḅ#$#%"Ḅ#.ᦑ⌱A.
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9C.2000(1-x)2=4500D.2000x2=4500ூᫀAூ᪆ூᑖ᪆2ᨴ° ¦Ḅ├82000(l+x)Ç3ᨴ° ¦Ḅ├82000(1+X)᪷·⚪zḄÊᐵËᑣ2ᑡºD.᪷·⚪¸2000(l+x)2=4500.ᦑ⌱A.*+B⚪ὃ^9fᐗκDḄÏᵨ2ᝅᵨ®᳛ᡂÑḄÒ;Ḅa,;ÔḄ6,u/ᙳ_;Ḅ®᳛x,ᑣᨵ(l+x)”=6,iᐵḄᦪ·×Øᐭᓽ2ᑮÚᔠ⚪¸ḄºD.2]7.Þßx=lᐵ¥xḄºD——-+——=2ḄᑣmḄâ8()mx-22-xA.-1B.2C.4D.3ூᫀCூ᪆ூᑖ᪆äᡝ1ØᐭæºDᑮᐵ¥UḄᑖçºDᐵ¥᪷ḄᑖçºDᓽ2.21äx=lØᐭºD——-+--=2inx-22-x21-----+----=2,=4,m-22-1§èéU=4ºDḄ.ᦑ⌱C.*+ᑖçºDḄêBëìiºDqíîᑖïḄᨬðñᑖïᓄᑖçºD8çºDçºDḄÔ⌕Øᐭᑮᨬðñᑖïzèéuᨬðñᑖï%Ê¥0,ᑣæᑖçºDḄᔲᑣæᑖçºDõ.8.÷ßäfᙽù30°ûḄüûýûþA8Cᢥ ᡠḄ8cᙠ6C┐50ᑣ/IḄ#ᦪ%()
10A.20°B.50°C.80°D.110°ூ*ᫀCூ-᪆ூ/-ᑖ᪆1NAC423ᵫ/]78=/-1᪷;Ḅឋ=8ZACA'=5Q°,>NAC8=30ᡠ?/BC4'=30°+50°=80°,ᵫ3/i&,ᡠ?/l=/BC4=80°.ᦑ*ᫀ%C.A1B⚪D⌕ὃGHḄឋ=IJḄKL Mᐰ2OPQḄRSḄᜳ23OPᑮḄVWX2.Q. ᙠ[\]MABCD^AC,BD_OEஹFஹGஹHᑖa_SBDஹBCஹACஹADḄO3]MEFGHḄMcdḄᐜfᙠᦪgh^ijᳮlmnopqlᐸ^┯tḄ_uvB.wE,F,G,H_ᔜᩩSḄ^zACLBD]MEFGH%{MC.wE,F,G,H_ᔜᩩSḄ^zAB=CD]MEFGH%|MD.wE,F,G,H}_ᔜᩩS^]MEFGH~?%]Mூ*ᫀBூ-᪆ூᑖ᪆ᵨMḄ^ᳮᑨ]MEFG”ḄMB.ᑨ]MEFG”Ḅᑁᔲ
11%C.᪷;|MḄᑨDwA£>=3QH,BD=3DE,AC=3CG,BC=3CFᑨ]MEFGH_]M.ூ/--1 1,F,G,"ᑖa_SBD,BC,AC,AḄ^.EF=—CD,FG=—AB,GH=—CD,HE=—AB,2222:.EF=GH,FG="E,.♦.]MEFGH%]M.ᑣA 2,wAC_L8£>/1=90N1>N2>/EHG,..]ME”G}~_{MᑣB┯t;B2AB=CD,.EF=FG=GH=HE,]MEFGHB_|M.ᑣC 3,!E,F,H,G_XPSḄ2ᑖ]MEFGH_]M.
12:E,F,H,G_XPSḄ2ᑖ./\EHD^/\BAD,/\CFG^/\CBA,HE\FG1.EH=FG,~AB~3~AB~3(•EH//AB,FG//AB,.EH//FG,]MEFGH_]Mᑣ.ᦑ⌱B.ூAᑨKLMḄᨵ1জ3MḄᐸKuᡈKḄvXᡠ᪀ᡂḄMQ¡Mঝᡂ£¤ḄKLMঞKᡂ£¤zᜳX2ḄKLM1টᨵKLX2ḄM.1 9. ᙠ2AABC^AB=6,ZAFB=90°,ᑣCFḄᨬ¨©%uvC.673-3D,373-3ூ*ᫀPூ-᪆ூᑖ᪆Fᙠ?AB%ªḄᙊwᙊ¬F,CᙠᩩCFᨬ¨©zᨬ¨©%CE-EF.ூ/- ABḄ^E,R®CE,FE.ᵫ3DAFB=qᡠ?EF=1AB=3,2ᵫ3QABC_2Mᡠ?CE=3¯wE,F,CᙠᩩCFᨵᨬ¨©zᨬ¨©%CE—EF=363ᦑ⌱D.
13ூAnLiᑮḄᨬ¨©°±ᐜ⌕iᙠLḄᙊᡈᙊ²³iwiQᙊ¬´ᙠᩩᨬ¨©.µஹ¶·⚪uBᜧ⚪ᐳ4¨⚪º¨⚪5ᑖ»20ᑖv11.¼½11-1|-4=.ூ*ᫀ-1ூ-᪆ூ/-ᑖ᪆1ᑖa¼½o1Ḅ©4Ḅ½¾᪷¿ÀÁ./-1|—1|—74=1—2=—1.ᦑ*ᫀ%1.A1B⚪ὃGH©½¾᪷LÂÃᦪḄ½¾᪷_ÂÃᦪLᦪḄ©Ä_ÂÃᦪ.2. 0Ū_1,AஹBஹC_ᙊᕜḄZBAC=36°,ᑣDzBCḄÈ_ூ*ᫀᐔ.ூ-᪆ூ/-ᑖ᪆1R®OB,OC,ᵫᙊᕜᳮ~8/BOCḄÈ¿᪷;²ÈÊn-./-1R®BOC,ᑣNBOC=2NBAC=2X36°=72°,
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