1、 4,120150.105.22B.305.4.I6012560.1costytx21(t)ABCD2)2(21xxxxfxaaA21B31C3D43a(23,1)b(2,0,4)c(46,2)AacbcBabacCacabD424xyxyA161yB161yC161xD161x5xyRx2y2x2y24ABCD6xyR0 xyA110 xyBsinsin0 xyC11()()022xyDlnln0 xy7ABCD-A1B1C1D1ABADAA160|AB|1|AD|2|AA1|3|AC1|()A5B6C4D88yxP,05311yxxyxP01343yxAB2CD19ABCABCabc(ab
2、)2c24C60abA34B34-8C1D32101,0 x 132axxaA1-B25-C1D25-11xy42 3BA,ABABC5D122,0 xfxf 0cossinxxfxxfA3243ffB1sin621ffC462ffD363ffII904520.13P0,xRxP_14nannS0,633aS d_15A1B1C1D1-ABCDEC1D1DEAC_1621,FF0,012222babyaxP 022PFOFOPO 2143PFPF_70.17-21.2223.60.17(12)ABC,A B C,a b c,A B C 3,b ac.18(12)nannS4(*)nnSanN.
3、1na221(*)2lognnbnNa2nnbbnnT34nT.19(12)P-ABCDABCDDAB60AB2ADPDABCD.PABDPDADA-PB-C20(12)21axexfxa34axfxf R a21(12)P 0,1F2:xl 22 PE F xE AB nmxyl:E CD AB AB El 122yx ABCDl10.2223.4-422xOy O xC4cos22ltytx221tl C AB P C AB PAB4-523121xxmxf5m2xf322xxyxfym1D2C3C4D 5C6C 7A8B 9A10A11D 12D13xR|x|014-2151010165
4、8PA10P3x4y13=0d=B102x3x+a1a2x3x01x2x3x+a1a2x3xmax2x3x012x3x200=1a1a1A111:y2=4xF10ABk=tan=ABy=x13x12=4x3x210 x+3=0 Ax1y1Bx2y2x1x2=1|AB|=|x1x2|=D2:221sin2ppxxAB3:12x0sinx0cosx0fxsinxfxcosx0gx=x0gx=x0D17,A B C 3B22sinsinsinabcABC2sin,2sinaA cC2sin2sin2sin2sin()3acACAA332(sincos)2 3sin()226AAA6 ABC 2,62
5、 363AA 83sin()(,162A(3,2 3ac12184nnSa114Sa12a21111(4)(4)nnnnnnnaSSaaaa12nnaa112nnaa4na212.12112()()22nnna 621112log2(2)nnbann211 11()(2)22nnb bn nnn82nnb bn111111111111(1)()()()23243546112nTnnnn11111 311(1)()22122 212nnnn31113()42124nn1219DAB60AB2ADBD3AD.BD2AD2AB2BDAD.PDABCDBDPD.ADPDD.BDPAD.PABD.4DA
6、DDAxD-xyzA(1,0,0)B(030)C(130)P(0,0,1)AB(130)PB(031)BC(1,0,0)PABn(xyz)00PBnABn0303zyyxn(313)PBCm00PBmBCmm(013)cosmn427277.A-PB-C277.1220f(x)f(x)ex1ax22ax1ax22.a43f(x)04x28x30 x132x212.x(1212(123232(32f(x)00f(x)*x132x2126f(x)Rf(x)Ra0ax22ax10R4a24a4a(a1)0a00a1.1221PxyE4Cx1y1Dx2y2m=0m0lx2+y2=1m2+1=n2y=1222C2=Cx2+y22x+2y=0 x12+y+12=2115ltt=xy=1+2tll|AB|=2=PAB1023m=5fx2x11x0 x43x2 52y=x2+2x+3=x+12+2x=12x=1m2y=x2+2x+3y=fxm22m410