中央电大经济数学基础形成性考核册答案全解

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！2021最新经济数学根底形成性考核册答案全解作业〔一〕xsinxlim___________________0xx0xx02f(x)x0k1设k,x0112yx在yx2f(xx2x5f(x)____________2x2ππ设f(x)xxf()__________221((f(x)xxyx2xx1pq(p)10eE2p2p111D111____________41111116AXbA0132t__________.00t101f(x)dx22xcf(x)___________________2xln22x(sinx)dxsinxc1f(x)dxF(x)cxfx)dxFx)c222de1x)dx___________20dx11P(x)0dtP(x)1t21x2x01045A3232a__________________A32161,B3AB32ABT=72.设,Bn(AB)A2ABB设设222,Bn(IB)AXX______________(IB)A11001001A020A__________A0012001003x1x2x2yDA．()．(,2)()(,2)()()或C．(,2)(2)．Bxx11x0xxx01sinxlimxsin1lim1xxx0x设ylg2xdy〔B1dx1dxln10dx1dxA．．．．2xxln10xxfx(B0Af(x)fx．limf(x)A00xx0Cfxfx00x0当.CsinxA．2xx)．．cosx．x以下函数在指定区间(,)B1xexx23xq(p)10020.4ppC42ln24ln2．-4ln2-42ln2A．4．D．4ppAexexexex．1．1dx0dx0221111xsinx0(xx)dx0．．2311AXbDnr(A)r(A)mr(A)nmnr(A)r(A)n．A．．．xxa121xxaC232x2xxa1233aaa0aaa0A．C．．123123aaa0aaa0．123123D)B2211x2．x2221lnxdxd()xc．sindxd(cosx)．112xd(2x)dxdx．x．ln2xxxsin2dxos(2x1)dx，x1x2dxdxA．．．D．1x2CD1162x2dx15．．．11(xxx0sindx023．B11xA．．．．dxexdxsindxxx21101C,BAB2ABACAOBCAO,BOABOC设A为34B52为TCT24．．3542B．．53A设A,Bn`(AB)AB(AB)AB．A．，111111．C．1231011111．．．．A22020000123222A3330123B444x23x2(x2)(xlimx21=〕lim=x21(xx(x2x1x1x1x25x6x26x8(x2)(xx31〕=limlim=(x2)(x4)=(x4)2x2x2x2lim1x1=lim(1x1x〕x(1xxx0x0x1(1x1=limlim(1x=2xx0x0351xx2x23x513x5333xx〕lim243〕=3x2x45x3555x0xx2xx3x0xx2x24(x2)(xsin(xx2〕limlim4sin(x2)x231xsinb,x0xa,sinxf(x)x0，x0xa,bf(x)x0在f(x)x0在.a,bb，1af(x)x0在ab1f(x)x0在1yy2x2ln2x〕y〕yx2logx222xxln22a(cxd)c(axb)adcbbaxyy=cxd(cxd)2(cxd)21132(3x3(3x5)1=yy2y〕y3x53x51〕y〕yxxeyy(xxx2xesinbxdyy(e)sinbxe(sinbx)aeebe(asinbxbcosbx)dye(asinbxbcosbx)dx32111(ddyyxe)dx〕y〕yexxxxx2sinxxe2dydy(2e2)dxxx2xxxcosnxn(sin〕y〕ysinxsinnx=yynn1+=nn1xxnxcoscos)nln(x1x2)y1111x)12x)(x1x)x)y2222x1x2x1x2x1x21x2411x2cot1211x2x2161325632〕y2cotyyxxxxx212xxd是y或yyx〕xyxy3x1dy22X2x2yyyxy30y32x(2yx)yy2x3dydx，2yxsin(xy)e4xy〕cos(xyy)e(yxy)4X(cos(xy)ex)y4yecos(xy)4ecos(xy)xyyecos(xy)xy22x2〕yx2)yyx)2231yx5x3，y1y及y〕y1x2244x作业〔二〕3x333xx()dx3c〕dxdx=x=exexexelne22xx2)113x)2dx=dx(x2xx)dx=dx〕x)222xxx42352xxxc=22355x2x241=xdx(x-2)dx22〕〕4dx=xcx2x2211111-2x)dxdx=ln12xc=212x12x12x211232xx2)=c2xdxx2xdx=(2)x〕x222223〕sinxxsinxx==2sinx2cosxcxxxxx2xdcosdx〕xsindxsindx=222xxxx2x2cosdx2xcos4sinc==2222ln(xxln(xx=ln(x1)d(x〕(xx(x1)dln(x1)(xln(xxc==2xx1d〕1115221xdx(xdx(xx)(xx)xx=1d12+=211221=2211111ee〕2x21ed=1xxdx=21e=ee21xxx2x2x11111〕e3e3e3〔1lnx)1d(1lnx)3xx=2e1x1xx1x1lnx111111201x2x22x22xx2x===〕x22222220000111dx2=xxxdxelndelnd(eee2〕xxxxxx=22=e2241111144edxxe4exex=x4xdex4=5〕xxxx41x40x00006210112021100〕〕=〕0053103503003012540=21231242451221436101322332712312424571972451221436107120610解1322332704732751521110=3214231123A111，B112AB。011011231232AB,A111112((222解2312011010123123B1120-1-10AB20001101112421，确定的值，使r()4．设矩阵A最小。答案：11012(2)(2)4124124A21047(2)014(110014047712479(2)()0144r()2409042532158543A1742041123答案：17420174(2)(2025321585430271563A58543(2)174202532109521(4)(4)411234112302715631742002715631r()2。(2)()3000000(4)(2)(0000132100132(AI)301010A3011111100132100097310(132100(2)3(2)201111204310043101321001305818(2)4(2)((2)011112010237001349001349130113010237(2)113(2)(237A10013493491363421〔2〕A=．答案21181363100100130(AI)421010421010(1)(2)(3)211001211001100130100130(2)(3)2001012011261)3)2(2)(3)01126001012100130130(2)(3)((01027121=71A00001201212,B12B．A3523答案：1210121010521052AI)(2)((2)2(2)(350101310131013110521X=A11131dyexedxyyeedyyexdxeecxyyxdye3xxxydydxyxeec〕2xdx3y22〕y(yx3x12p(x),q(x)(x3答案：，代入公式锝x1ye2dx2dxe2ln(dxc(x3ecx(x3e2ln(x=x1x11222e2ln(x(x(xdxc((yxxxc)32yy2xsin2xx〕9111p(x),q(x)2x2xyedx2x2cdxxxxelnx2xsin2xedxclnx1x2xsin2xdxcxsin2xd2xcxyx(2xc)ye2xy,y(0)0dy111eeeeceecedyedx2y(0)02y，200，xyxyxdx22211eeyx22e00xyy,yx1e1xexyyPXQX(),()答案：，，代入公式锝XxXxx1exxdxceece11xyeelnxedxcxdxdx0ln，把y代入xxxxxx11ye,y(ee)xxxxx2xx0134xx3x2x0〕12342xx5x3x01234x2xx,x134xxxx1223410211021021A1132011101112150110000x2xx,x134xxxx12234102xxxx11234〕x2xx4x21234x7x4xx51234答案：211111214212142(2)(2)(Ab)12142(2)2111105373(1745174505373164101214212142053755537337301011(2)555(2)(2)(2)()5550000000000500000164xxx53575x,x134312xxx555234当xx5x4x212342xx3xx112343x2x2x3x312347x5x9x10x123411542115422131(2)(2)0193(Ab)(322330193759(4)(7)