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3B18.=>!($ᙠABC$:Ai)Bi)CiᑖO2BCஹACஹABḄ:,A,B,C2ᑖO2BiJ,22A1C1)A1B1Ḅ:$äå@æ....4AABCḄᕜTB1,ᑣACḄᕜTB.tlrlஹ⚪ᜧ⚪ᐳ66ᑖ.ᑏᙠ⚪ᓱ.19.ÁÂ:-6tan30°+Ã+"ë=20.($=>ZC=4,ì48S8cḄT.21.ᙠM☢HÍᙶ᪗í$:AஹBḄᙶ᪗ᑖO20,3ஹ-4,0,1yaAOBî:A⌮g┐ñò90ᑮAAEF,:0,B:ᑖO2E,F,óᙠ(ôÃAEF,õᑏÃEஹFḄᙶ᪗;22O:B[A$y4AEF¢[AÈᣚtBᩭḄ!$ᙠXYᑁôÃ~ùᔠᩩûḄAiEjFi.]4⚓/`27⚓
422.ᙠRSABC$ZC=90°,᪷¿£ᑡᩩûüHÍKÍW:(1)a=875-b=8V15;(2)ZB=45°,c=14.23.᪷¿(1((ᓫ[!mm),ì+ᱥ.Ḅ.D.24.($ᙠþWABCD$AB=4,BC=6,M2BCḄ:$DE_LAMQ:E.(1)ìÿ AADES/\MAB(2)DEḄ.k25. ᱥ y=ax2+bx+cA(2,3)ஹB(m,2)ஹC(-3,n).X(1)ᱥḄ᪆(2)ᙠ☢ᙶ᪗!"#$AஹBஹC,%$AABCḄ☢&.'5⚓/*27⚓
5k26.-./ᦪyi=-x+4Ḅ-1/ᦪH=(x>0)Ḅ-1A(m,1),B(1,n)2.X(1)k,m,nḄ3(2)ᑭᵨ-1ᑏ$7x2l8.yi9y2Ḅᜧ;ᐵ!.27.=>Ḅ?@Aᩩ᳝DEFGH.I@2JḄK@LMNOᐲQᨬ=ḄSTU.ᦪVWᳮZ".;ᙠᓭK@L]ḄA,B2ᜐ.ᑭᵨ_`ᑖbcᓅJḄTSeDfgh_i.-._jNDAC=45.ZDBC=65°.lAB=132m.TSeDᑮᓭK@LACḄopqrstmu(vwᑮIm.xὃᦪz sin65°~0.91,cos65°~0.42,tan65°~2.14)k28.-.y="x+lx{ஹV{ᑖb|A,82.y=-(x>0)|}.PC_Lx{C,~PC=2,AḄᙶ᪗r(2,0).(1)Ḅ᪆(2)lr]}Ḅ.~{“.7.C,.r⚔Ḅ088.Ḅᙶ᪗.'6⚓/*27⚓
6ூᑖ᪆ᵞᾓḕ2021-2022V"ὃᦪV⚪᪆᱐ஹ⌱⌱ ;⚪3ᑖ.ᐳ30ᑖ.1.-ᡠ£.¤¥¦§Ḅ¨©-OOAPB£1ªDHூ«ᫀBூ᪆ூ®ᵫ¥¦§Ḅ¨©-O°]☢±ᑮḄ©-.ᡠ¤¥¦§Ḅ¨©-O2²ᝅᙠ´Ḅµ.%~;µ¶ᜧµḄ·¸.¹º⌱⚗B¼½.ᦑ⌱B.2.l¿ÀÁ/ᦪÂ=£4r0Ḅ-1P-2,3,ᑣ¤/ᦪḄ-1ËḄOA.3,-2B.1,-6C.—1,6D.-1,-6ூ«ᫀDூ᪆ூᑖ᪆Ñ}-2,3Òᐭ᪆.ÔjÕ=ᑗ=-6,zºᓽÔᑨ.ூ® 3x-2=-6,ᦑ¤/ᦪḄ-13,—2lx-6=-6,ᦑ¤/ᦪḄ-11,—6—1x6=—6,ᦑ¤/ᦪḄ-11,6-1x-6}6,ᦑ¤/ᦪḄ-1ÛËH-1,-6.ᦑ⌱ D.ூÜÝ⚪ὃÞh¿ÀÁ/ᦪḄß.àáᙢ,w2²ãixஹyUåḄᐵ!Ô⊤£ᡂ=èx·réᦪ.ê0Ḅë.ìíîyOxḄ¿ÀÁ/ᦪ.'7⚓/*27⚓
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10ᙠᓭÞß45}ᔣ®ᢥÈ}ᔣ;ãh10æçäCᜐÜGàáPᙠ|ß}ᔣ®ᑣA,BéêḄ³´æç.A.10^/3B.1072-10C.10D.1073-10ூ-ᫀDூ᪆———=ìGWx=10V3-10 ᦑ⌱D.ூJᵫ⚪ëG:AB+10310.aU/]Naî®Ḅïë{U“C_L8c_UC,CDLABஹD,ñᑡᵨcwy⊤)BDBCADCDA---B.c.----D.——BC~ABACACூ-ᫀCூ᪆ூᑖ᪆ᑭᵨᚖbḄCÇ9õöḄCG8Na=N4CD,÷øᑭᵨ┦<=<>ᦪᐵùG8-ᫀ.ூJW"AC±BC,CDLAB,.Za+ZBCD=/ACD+/BCD,:/a=/ACD,BDBCDCcosa=cosZ-ACD=---=~ACBCABú⌕⌱⚗C┯ýþᔠ⚪.11⚓/27⚓
11ᦑ⌱c.ூ⚪⌕ὃ┦ᦪḄ!"Na=NACD#$⚪ᐵ&.'ஹ)*⚪+,-⚪3ᑖᐳ30ᑖ.011.ᙠ2/BC3NB=45°,cos/=,ᑣNCḄ5ᦪ#__.ூ7ᫀ75ூ$᪆ூ;$<=ᙠ2/SC3cos<=L,>!//=60°,?@NB=45,᪷BCḄᑁE2ᳮ>!NC=75°.12.ᙠGHIJK!H᪷LM2mḄNOḄPQM1m,RIK!HSTUᱥḄPQM9m,WXYSTUᱥḄL5Mm.ூ7ᫀ18ூ$᪆ூ;$ᑖ᪆᪷BRIRᙢḄᱥL[PQᡂ]^ᑡ`abᓽ>!$.;$dYSTUᱥḄL5Mxm,2xᵫ⚪!19$!x=18,ᓽYSTUᱥḄL5M18m.ᦑ7ᫀM18.RIRᙢḄᱥL[PQᡂ]^ᑭᵨhiCḄhi^ᑡ"jklm$jkn"YSLoḄL5⊤qjkḄrs.13.u#ᵫHvwᐰy]Ḅ-zj{|ᡂḄ}~{ḄuEuᡂY}~{Ḅ-zj{Ḅᦪᨬ#.ூ7ᫀ6ூ$᪆12⚓/27⚓
12ூᑖ᪆✌ᐜ᪷B}~{Ḅu>!Y~{ᐳᨵ3ᯠu3>"-zj{ḄᦪCuᑨ"'ஹḄᦪn"ᡂY}~{Ḅ-zj{Ḅᦪ#ᓽ>.ூ;$$᪷B}~{Ḅu>!Y}~{ᐳᨵ3u>>"Ḅᦪ#41ᨵ1-zj{'ᨵ1-zj{IᡂY}~{Ḅ-zj{Ḅᦪ#:1+1+4=6+0*2ᨵ1-zj{'ᨵ2-zj{Iᡈᨵ2-zj{'ᨵ1-zj{IᡂY}~{Ḅ-zj{Ḅᦪ#1+2+4=7+03ᨵ2-zj{'ᨵ2-zj{IᡂY}~{Ḅ-zj{Ḅᦪ#2+2+4=8+0.>!ᡂY}~{Ḅ-zj{Ḅᦪ#6ᡈ7ᡈ8.ᡠᡂY}~{Ḅ-zj{Ḅᦪᨬ#6ᦑ7ᫀM6ூ⚪⌕ὃᵫuᑨ}~{ὃ*s¡$7⚪Ḅᐵ⌕¢£ᵫus}~{ḄC¤ᑖ¥᪷B¦uஹuEus}~{Ḅ§☢ஹ☢E©☢ḄC.14.u#H}~{Ḅu᪷BuªḄᦪB>ab"«}~{Ḅ⊤☢¬M左视图ூ7ᫀ907rூ$᪆ூᑖ᪆᪷Bᙊ┵©☢¬¯`✌ᐜn"ᙊ┵Ḅ©☢¬°n"±☢ᙊḄ☢¬Mᓽ>!"⊤☢¬.ூ;$$••,uᡠª>=ᙊ┵ḄLM12,±☢ᙊḄ´µM10,ᙊ┵Ḅ¶·M13,13⚓/27⚓
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