搜索
1(,)xy11(,)xy221)0(12222babyaxABABM(x0,y0)02020kbyax2)0,0(12222babyaxlABABM(x0,y0)02020kbyax3y2=2pxp0lABABM(x0,y0),2y0k=2p,y0k=p.xy2221A21P1P2P1P2P2PF1F2P(x,y)xayb22221Fc10(,)Fc20(,)PFF12PFF211sinsin)sin(e2|||PFPF13233ypxpxytx210()()12ABOAOBptf(t)4121aaaa2NAB,1xy234y2=2px(p0)Ma,01LAB|AB|2p1a2ABxNNAB51--------LCxA-10B08LCLC2-----Q20Cx2+y2=1,MC|MQ|0,M6Cxy22431myxm4C7kkyyxx1212121lkP(,)20Cyx:()241lC1k2lABCMNQO1340xymxyxy2220PQOOPOQm2Oyyx1PQOPOQ||PQ1023Cxyxy122420Cxyy222240l2410xy4P22221xyabABOAPBP5ABykxbaxbxc20xAxB||||ABkxxAB12||12akxy10xy22416ABF1F2xy222591ABF1||AB8||||22BFAFA32Fyx24Py24x||||PAPFP1.12tan,[0,)k0022AxByCdAB2121tan1kkkk3ykxb1122(,),(,)AxyBxy2121ABkxx221212(1)[()4]kxxxx12211AByyk41212llkk=-1212121//bbkkll2(1)221(0,0)xymnmnmn2222()()2xcyxcyacos,sinxayb(2)221(0)xymnmn2222|()()|2xcyxcya(3)22222bbpaa(4)21FF13422yxM221MFMFMABCD(5)122tan2FPFPbS122cot2FPFPbS2221212121212||||4,cos,||||cos||||PFPFcFPFPFPFPFPFPFPF(6)100;xaexaeyy20||xexa311||,||22ppxxyy(6)111,yxA22,yxBbaM,13422yxAB1342121yx1342222yx03422212221yyxx3421212121yyyyxxxxABk=ba43201122(,),(,)AxyBxy121-2ABFykxbk1ABC805422yxAAy.1ABCBC;2A090ADBCDD.BCBCA090ABAC016)(14212121yyyyxxD1B1x,1y,C(2x,2y),BC(00,yx),F(2,0)11620,1162022222121yxyx016))((20))((21212121yyyyxxxx04500kyx(1)F(2,0)2321xx30x03421yy20y156kBC02856yx2)ABAC016)(14212121yyyyxx2BC8054,22yxbkxy080510)54(222bbkxxk2215410kkbxx222154805kbxx2222122154804,548kkbyykkyy20541632922kbb)(4b94b0)94Dx,y1494xyxy016329922yxyD)4()920()916(222yyx42ABCDCDAB2EACCDEAB4332exOyChc,212222byaxh,,EExy12222byax(,,,)0fabc(,)0fe.h,(,,,)0fabc(,)0fe,.AByABxxOyCDyCDABCDyA0,cChc,2E00,yx||21ABch122120cccx10hy12222byaxaceCECEace14222bhe11124222bhe14222ebh214442e1312e433243231322e107e10,7,AEAC,,,AEAC,ECh,,ECAEaexACaex22121Ecccx1AEAC1312e433243231322e107e10,753122:22xyCl0,2Ak10kBl2kB1.BlC.0.10)2(:kxkylkkkxyl2222:'k.2Bl2.ly0lll2x10212222kkkxkx)2,(2xxMCMl212222kkxkx10kx.10kkxxx22.222222kxkxkxkxx)1(22222kkxkx02)1(2,)2)1(2(222222kxkkkxkkx.02)1(2,022)1(22)1(221222222kxkkkkxkkkxk10k022)1(22)1(22122222kkxkkkxk02)1(22kxkk022)1(22)1(22122222kkxkkkxk.x0552k..4C:xy2228P41PABABQAPPBAQQBQ..Q.),(yxQABABkyx,kQABAPPBAQQB.ABPQ)(82)(4BABABAxxxxxxxxkABC..yQABy=k(x4)+1kQQBAQPBAP)(82)(4BABABAxxxxxxxkfxkfxyx,k1)4(xky41xykkfx),(),(,,2211yxQyxByxAQBAQPBAPxxxxxx212144)(82)(4212121xxxxxxx1AB1)4(xkyCyx08)41(2)41(412222kxkkxk2.128)41(2,12)14(42221221kkxxkkkxx1.234kkx(3)1)4(xkyk.0)4(42xyx202464642kk41024102k3.910216910216xQ042yx910216910216x....65lP03xy22941ABAPPB.APPB=BAxx,..1:APPB=BAxxBAxx,3ABk.BAxx,kyx.1lx51PBAP;lx)(,,2211yxByxAl3kxyy045544922kxxkly=kx+3yxxA=fkxB=gkkAP/PB=xA/xBk.4959627222,1kkkxyPy0k.0k4959627221kkkx4959627222kkkx21xxPBAP=5929592922kkkk=59291812kkk=25929181k.049180)54(22kk,952k51592918112k511PBAP.2:.kk.21xxPBAP21,xx.21,xx.2l3kxyyly=kx+3yxxA+xB=fkxAxB=gkkAP/PB=xA/xBk045544922kxxk*.4945,4954221221kxxkkxx21xx.20453242122kk*,0952k5362045324422kk536214551.10151.511PBAP....6BA,OF1FBAF1OFMlQP,lFPQMl;2,1ab1AFFB1OF()()1acac1c1PQkFPQM,PQMFMPFQ2222yxmxy2234220xmxm0MPFQmm22221(0)xyabab,1c1FBAF22()()1acacac22a2212xylQP,FPQM1122(,),(,)PxyQxy(0,1),(1,0)MF1PQklyxm2222yxmxy2234220xmxm12210(1)(1)MPFQxxyy(1,2)iiyxmi1221(1)()(1)0xxxmxm212122()(1)0xxxxmmm222242(1)033mmmmm43m1m43m7E(2,0)A(2,0)B31,2CEDEAB(1,0),(1,0)FHDFHDFHABC122nymxnm,nm,122nymx0,0nm(2,0)A(2,0)B3(1,)2CE41,914mmn11,43mn.E22143xy||2FHDFHhhSDFH221Dh3DFHS3DFHRDFH6621RSDFHD33,0DFHDFHDDDFH3rSDFH2133rR333(0,)3.rS218)01(C5322yxCAB.AB12ABxMMBMAM.ABAB(1)ykx(1)ykx5322yxy2222(31)6350.kxkxk1122()()AxyBxy4222122364(31)(35)0(1)6.(2)31kkkkxxkAB122122312312xxkk33kAB310xy310xy.x(,0)MmMBMA.ABx22121222635.(3)3131kkxxxxkk212121212()()()()(1)(1)MAMBxmxmyyxmxmkxx22221212(1)()().kxxkmxxkm(3)222222114(2)(31)2(61)5333131mkmmkMAMBmmkk2216142.33(31)mmmkMBMAk761403mm4.9MAMBABxAB22113373m4.9MAMBx703MMBMA.222222114(2)(31)2(61)5333131mkmmkMAMBmmkk2216142.33(31)mmmk9x2M21OMlymm0lABmMAMBx.1)0(12222babyax2811422222bababa12822yxlOMymKOM=21mxyl210422128212222mmxxyxmxylAB0,22,0)42(4)2(22mmmmMAMBk1k2k1+k2=042,2),,(),,(221212211mxxmxxyxByxA21,21222111xykxyk042222mmxx42,222121mxxmxx)2)(2()2)(1()2()1(2121211221221121xxxyxyxyxykk)2)(2()1(4)2)(2(42)2)(2()1(4))(2()2)(2()2)(121()2)(121(212212121211221xxmmmmxxmxxmxxxxxmxxmx00)2)(2(444242212122kkxxmmmmMAMBx.MAMBx021kk1012222byax332e),0(),0,(bBaA.2312)0(5kkxyCDCDBk.1,332acAB1byax.3,1.2322abcabbaabd..1322yx233522yxkxyy07830)31(22kxxk.CDyxDyxC),,(),,(2211),(00yxE.11,315531152002002210kxykkkxykkxxxBE,000kkyx7,0,03153115222kkkkkkkk=7.:CDBBC=BDBECD;11CxC31CII:ly=kx+mCABABABCl22221(0)xyabab31acac222213acbac22143xyII1122()()AxyBxy221.43ykxmxy222(34)84(3)0kxmkxm22222212221226416(34)(3)03408344(3).34mkkmkmmkxxkmxxk22221212121223(4)()()()34mkyykxmkxmkxxmkxxmkAB(20)D1ADBDkk1222211xyxy.1212122()40yyxxxx2222223(4)4(3)1540343434mkmmkkkk2271640mmkk12227kmkm22340km12mkl(2)ykx(20)227kml27ykx207l207ABCCACB;12)0,0(12222babyax21FF,P.P)516,5413(,21PFPF,||3||21PFPF,e,.(),1PF)516,5413(c,2PF)516,5413(c,21PFPF,,021PFPF)5413(c0)516()5413(2c15,252cc.:,2||||21aPFPF2222)516()54135()516()54135(2a6)341()341(22,4,