中央电大工程数学形成性考核册答案

经典word整理文档，仅参考，双击此处可删除页眉页脚。本资料属于网络整理，如有侵权，请联系删除，谢谢！工程数学作业（一）答案第22aaaaaa1bbb231232232323Dab1ab2ab312ccc3123ccc1231234466000100a00200100a1aA11112211103c23C24521178A,BnABAB111(AB)11(AB)AB(AB)AB111111A,Bnk0k1且DABABABnABkAkA(k)An若AA1若A,B若A,B若A,BnnnAB013213132255353212ABA0A,B,CA0*0A*0n(ACB)1D(B)ACBCA11111A1C1(B)1(B)CA111A,B,Cn(AB)A2ABB(AB)BBAB2222(2ABC)2CBA(2)2CBA11111/142210⒈⒉140．00111111x111．xCB为4A为34B25为1153558A011212006340,B()ABA31451834A,BAB32AB．3A,B3A1,B3AB)．121aAAa．01212402．03AO1OA11,A1．12OAOA122812,B154ABAC2ACABA,C354331(AB)C．03661716ABACAC231804372622775621A5BAB(AB)C120231215180114121103．A,B,C3210122110021140246410ACBC(ABC32122102010023101023A2XBA121,B111X．3422112/143A2XB34183225112XAB)25211227115711522241020143602533110a,a41020120a(4360a(13645414242253053123410001101222122312．⑴111111111221102）13200121210012210010223r2r1312rrA|I220102rr1203621006320103622rr132322100100922112212122013r9919102331009919222121222rrA1r01210310103r3r9292919232321001299002199999999922626171000001752011）A1)A101101021415310110111101100101210121132013/14101101110110111011011rr11011001201101110110111rr13242rrrr141012100001110000111021132001112210001110RA()310110110110111rr34000111000000004AAA(')''(')'''AAAAAAAAAAA是nIA11或．A是nI2AAI1A1或A1AAAAA1(A)(A)A(A)111即A工程数学作业（第二次）)第32)x12x4x1x231xxx0C232x2x33[1,0,2][7,2,2][11,2,2][11,2,2]x12x3x223xx6B133x3x423100130,1,0,2,0011432454/1410111001,,,B1112340101,,,,,121231241⒌与AA(A)(A)秩(A)(A)秩秩秩秩秩(A)(A)秩(A)(A)1秩AD,,,A12snx是是是B是xnABBA()PAP1BPAPB2)xx012x0x121,1,10,0,0,121,2,3,1,2,0,1,0,0,0,0,0x00xx112233123,,量1231,0,0,1,0,0,．12312,,,,,,12s12s05(A)3bbX0X,X012XkXkX．011220IAA1A第19)5/14x3x2xx612343x8xx5x012342xx4xx1234432xxxx123413216132160171001738153rr3rr01282182rr5rrA1323rrrr14142141058100014132013480010017818101003rr01781819rr0104131317rrr432r25rr33340033001140011400561300560001001000201001x2rr010411115rrr421rrx443001143001012x10001300013x4111x11y112z??1111111221111rrA111120113rrrr2311110111223］112011)rr2300(2))2当1且2R()R(A)31()()1当RARA,,12382353756,,,7103123321xxx12311223323581037756301341,,,A1037001011712357132110000R(A)R()6/14不能由向量123131117392,8,0,61233439336413131113110112173906,,,2800018123400000000393341336x3xx2x012345xx2x3x01234xx2x5x0122343540xxx145113121312310rr51235rr01437142142112rrrr01437A13233rrrr0142411125014370000014310350400351251251010100121414114r1r33131311201r01rr0102rr3332341402314021140000000000000100000055xx1314x3x3令x114233010x45x2x3xx12343xx4x2x51234x9x4x1245361xxxx12347/1497121523111523111015rr31425rr0142728142112728rrrrA0142134235rr2rr14219041701427280000000000536102841456971101712x1xx111341201291211472000000000xxx2722340令，，xk3xk4kk12127171kk1x19292121112112xkk2kkx712272012310kx10401k2,a,a,aa123411110111，，，0011234000110000100001012132430001a10001a0100a1)))aaaaaaa20010a123412213324433a00014(aa(aa(aaa12123234344AXBnR(A)R()nAXBR(A)nRAn0()AXB0101AA(AA(A)A()A11118/141A11即1A2fxxxxxx2xx2xx2xx2122232412242334f(xx)xx2xx2xx2xx(xx)x2xxx)x2xx2232422324122423341232424(xx)(xxx)x222212324令yxx，yxxx，yx，xy11223243244xyy113xy即23xyyy3234xy44fyyy212223工程数学作业（第三次）)第4⒈A,B(AB)BA(AB)BA(AB)BA(AB)BAA与BUUA与B且CA,BDA,BA,BABABA,BA,BA,BA,B(031Dpp)p1ppppppp))))33322X~B(n,p)E(X),D(X)n与Ap设f(x)Xa,b(ab)E(X)，Axfxx()dxfxx()dbafxxb()d()dfxxaBsinx,xsinx,0xff(x)f(x)2220,0,其它其它sinx,0xx,0x(x)2()fx0,其它0,其它Xf(x)F(x)(a,b)PaXb()9/14（F(a)Fb)bF(x)dxaf(a)f(b)fxx()dba设XE(X),D(X)2CE(Y)0,D(Y)1．XYXYXYXY223．5P(A),P(B)A,BA,BP(AB)，P(AB)．P(AB)．PABAP(AB)P(AB),P()pP(B)1P．A,BP(A)p,P(B)qP(AB)pq．P(A),P(B)A,BP(AB)，P(AB)．0x001．X~U(0,XF(x)xx1x1若X~B(20,E(X)．若X~N(,2)P(X)2．E[(XE(X))(YE(Y))](X,Y)设A,B,CA,B,C⑴A,B,C⑵A,B,C⑶A,B,C⑷A,B,C⑸A,B,C⑹A,B,CCABC解ABCABCABCABCABCABCABCABCABC322⑴2⑵21解设A=2B=21C312P(B)CCC639P()C23C221312C2310510102525i）AiP(AA)P(A)P(A|A)12121A"产品由甲厂生产"A"产品由乙厂生产"A"产品由丙厂生产"123B""10/14P(B)P(A)P(B|A)P(A)P(B|A)P(A)P(B|A)1122330.50.90.30.850.20.800.865XpPX(PP(X2)P)PP(XP)P2P(Xk)P)k1P故X123kpp)pp)pp)k1p2X0123456P(X4),P(2X5),P(X．(X(X(X(X(X(XP(2X5)P(X2)P(XP(X4)P(X5)0.20.30.120.10.72P(X1P(X10.30.7X2x,0x1f(x)0,其它11P(X),P(X2)．24112()2fx211x2201PX()2401151621P(X2)f(x)dx2xdxx2141114442x,0x1E(X),D(X)．设X~f(x)0,其它231231E(X)(x)x2x300)xf(x)x2x4112221E(X2420012()231D(X)E(X)[E(x222P(X)P(X．XN设~)2X1X121X1P(XP(111n,X,,XE(X),D(X)XX设X212n11nii1E(X),D(X)．11/14111nE(XE(X)E(X