2018华工经济数学平时作业答案

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11x217011002xx1(30)3xAA214011006xxB213011006xxC254011006xxD253011006xx2()fx[0,1]()fxa+()fxa102aCA[,1]aaB[,1]aaC[,1]aaD[,1]aa30sinlimxkxxBA0BkC1kD242lim(1)xxxCAeB1eC2eD21e5,ab2,2()1,23,2axbxfxxbxx2xAA1,12abB3,12abC1,22abD3,22ab632yx+x1xBA32B52C12D12721()40032Cxxx100PxxPBA3B3xC23xD132x382(24)?xxxedxDA2(48)xxxeB2(48)xxxecC2(48)xxxeD2(48)xxxec912201xxdxDA2B4C8D161011221212xxxxAA12xxB12xxC21xxD212xx111214012110130131D=BA-8B-7C-6D-5412yxxyxxyyxyyx=BA332()xyB332()xyC332()xyD332()xy13123123123000xxxxxxxxx=CA-1B0C1D21450906791A67356300BAB=DA1041106084B1041116280C1041116084D1041116284515343122321A1A=DA13235322111B13235322111C13235322111D1323532211116iAiiAAA1234AAAAB12341AAAAC1234AAAAD12341AAAA17823BA356B815C715D251841DA16125B17125C108125D1091251950%30%20%90%85%80%,DA0.725B0.5C0.825D0.86520X2,01()0,AxxpxelseA(C)A1B2C3D171x()5200Cxx2()100.01Rxxx.==C=x+1)-C(x)=5Rx)=10-0.01x2=5x=500=225x-0.01x2-200.2220131limxxx.220131limxxx=0limx1231223xxx=0limx12313x=233213lim21xxaxxa.x-1x-102x+1(x+3)-1-p=2p=-3,x+1(x+3)=x^2+ax+3a=442cosyxdydx.y=u,u=cos2xy=cos2x,xxdxysincos2d5()(ln)fxyfxe()fxy.y=)('.).(ln).(ln'1)()(xfexfexfxxfxf8621dxx.21dxx=-1/x)+c7ln(1)xxdx.cxxxxxdxxxxxxdxxxxxxxxdxxxxdxxxdxxxxxxxdxxxxxdxxx)1ln(212141)1ln(2111212141)1ln(2112141)1ln(2112121)1ln(21121)ln(21)1(2)1ln(21)1ln(22222222222281ln1bxdxb.ebbbbbbbbxxdxxb1ln0ln)1(0ln)(lnln19dxex11.:cedxexx)1ln(119102()21fxxx1101AA()fA.Af(A)=751512-21533+10301=0000114,4,416)(2xaxxxxf),(,a.x4f(x)8a=81222yx4yx.yyl=-2,y2=4X1=2,x2=8183012)42y422dyy13263113111,112011011ABAB.AB=81121236101|AB|=-510141213A,1012B,ABBA.(I-A)B=5425539015101111211A1A.(|)PAB=1/3,(|)PBA=1/2(|)PAB=()()31()11PAPABPB16731.1.P=6(6+3)=2/32.,P=7(2+7)=7/9111yx)123(252xxy360xx4011731)(23xxxxC(),3100)(xxxR.L()=R()-C()=-1/3212,XX1X01232X0123kP0.40.30.20.1kP0.30.50.20E(X1)=0*0.4+1*0.3+2*0.2+3*0.1=1E(X2)=0*0.3+1*0.5+2*0.2+3*0=0.9E(X1)E(X2)

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