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48124.1A(m1-1)B(0-m2)C(-1m3)ABACm___13)-(-___2[x]x[-2.1]=-3,[7]=7,[|12x|]=3,x____5,225-______315________4)0(2||xxxxy_____)0(11xxy_______5)(Ryxyixz|2||4|zizyx42__24____6AA1CC1PQA1P=CQPQBB-APQC___13____7}{na41limnnS}{na__)21,41()41(0_____8ABC21sinA23sinCcba::=___3:1:13:1:2_____9nyx)(1024k___13-k____10a0)(-O(00)A(4,0)B(1a)AOB()a_______3______13245BCQPAA1B1C1111)-(-2(0,1)(-1,0)(1,2)____|1|)(2xxf_____________12()(1)------(4)75797882(5)(6)76----85(85)80____0.15_______164ABCD4.130)1)(2(xx02x01x(D)ABCD14Zkkxx,412MZkkxxN,214(B)ANMBNMCNMDNM1543,21csc2sec222yx(D)AxByCxDy16)(xf[3,7]5)(xf[-7-3](A)A-5B-5C-5D-5866.1712abcABCBCCAAB222mcba1000cotcotcotBACm(m=2001)1812ABCDAB=1BC=a,PAABCD,PA=1(1)BCEEDPEPDAE(2)(1)E-PD-A()(1)EC=x,AEED222ADEDAE22211)(axxa012axx=0a=2,x=1EBCAABADAPxyz1)-(0,2PD0)(1,1AE510cosPDAE510arccos(2)EHADHHFPDEFEFPD()EFHA-PD-E5arctan21.14.0.5128.1yV2150016000100016000501000VVV).(Vy5.016VVy5.0V827500500160001000VVy12VV160001000V=4750014CBAEPD2014}{na,d,}{nb,q2qd,51103ab,nnnbac()}{nc()}{ncnnS,limnnnSnb.()592512121ab,11b,131a21522)1(13nnan12nnb12)152(nnnc(6)()nnnbababaS221113221nnnbababaqS.-13211)()1(nnnnbabbbdbaSq=11ba+1121)1(nnnbaqqbd=nnn2)152(21)21(22131=]172)172[(nn172)172(nnnS10limnnnSnb=limn172)172(21nnnn=limn=412172)172(11nnn141916(1)y(2)x(3))0,3(P2(a,0)a0)(42axxyP(x0,y0)20202)3(|AP|yx220200200812)32(4496)(aaaxaaxxxxf(1)1a496)()(2min0aaafxfa=5a=1(2)10a4818)23()(2min0aaafxf21a)5(202xy)1(42xy)21(22xy22(18)xaxxf2)(]1,0(a11a)(xfy2)(xfya3)(xfy]1,0(xx1)(xfy),22[2)(xfy]1,0(,21xx21xx)()(21xfxf0)2()(2121xxaxx212xxa]1,0(,21xx)0,2(221xx2aa]2,(30a)(xfy]1.0(1xa222a)(xfy]1,0(1xa202a)(xfy]22,0(a]1,22[a22axa22