搜索
11x2110%3215%3()A110%+15%xB1+10%15%xCx10%x+15%D110%1+15%x2ab|ab|+|a+b|A2aB2aC2bD2b3ABEACABEBFCADBFBFD1B31ACFADB3()A1B2C3D44OBOD=40AOC()A40B120C140D1501AB=8CABDCBDB=1.5CD2A1AxA2A1A14A2A26A3nAnAn19n360cmABCDAA60m/minB69m/min____________4n245n=______________5ABCDAB=6ABCDAB5A1B1C1D12A1B1C1D1A1B15A2B2C2D2nAn1Bn1Cn1Dn1An1Bn15AnBnCnDnn2ABn56n=1MABCAMDBMCDMB1cm/s2cm/sBA1AB=10cmCD2sAC+MD2CDMD=2ACAM=AB32NABANBN=MN2ABC241010AC4/6/12ABC403720km1120km/h80km/h20min411COABOOEOFAOCBOCEOF22AOC=BOD=80OEOFAODBOCEOF3AOC=BOD=BODOOCODOEOFAODBOC+180EOC=5AOB=90OOBBOCAOCBOCOMON11OCAOBBOC=30MON=45BOC=nMON=4522OCAOBBOCMON32BOCBOC3MON6AOB=120OCOAO20ODOBO5OCODt0t151tOCOD2tOCOD3OCODOCOBODt7AOBOAPO18cmMMOOB2cm/sQOOB1cm/sPQts1PMOPO=cmt2PMOtOP=OQ3QO16cmNQPQt83060PAPBMNPACPBDP1DPC=902PACPAPNPPFAPDPECPDEPF3PACPAPNP3/PBDPBPMP2/PCPMtBPN=__________CPD=________tBPN+CPD___________11x2110%3215%3()A110%+15%xB1+10%15%xCx10%x+15%D110%1+15%x3123110%1+15%xD2ab|ab|+|a+b|A2aB2aC2bD2ba10b1ab0a+b0=baab=2aA3ABEACABEBFCADBFBFD1B31ACFADB3()A1B2C3D4CAB=CAE=ADC=ADB=90CAABCAB=901+B=901B1B1DACDACBAD3CAABADBCCAB=ADC=90B+1=901+DAC=90B=DACCAE=CAB=90B+CAB=DAC+CAEACF=DAE1ACFDAECAB=CAE=ADC=ADB=90ADB3C4OBOD=40AOC()A40B120C140D150AOB=COD=90AOD+BOD=BOC+BOD=90AOD=BOC=90BOD=50AOC=AOD+BOD+BOC=140C1AB=8CABDCBDB=1.5CD2.55.5CBDCBDCBAB=8CABCB=AB=41DCBCD=CB+BD=5.52DCBCD=CBBD=2.52.55.52A1AxA2A1A14A2A26A3nAnAn19n1819AAAn191+21+2An19n19=1+2n=19n19=1+2n=181819A360cmABCDAA60m/minB69m/min20minx90369x=60x+603x69x=60x+603x=2020min204n245n=161527311417nnn1+5245n521+5=732+5=1143+5=17n[nn1+5][nn1+5]=245n1=16n2=15165ABCDAB=6ABCDAB5A1B1C1D12A1B1C1D1A1B15A2B2C2D2nAn1Bn1Cn1Dn1An1Bn15AnBnCnDnn2ABn56n=10AA1=5A1A2=5A2B1=A1B1A1A2=65=1AB1AB2ABn=n+15+1nAB=61ABCDAB5A1B1C1D12A1B1C1D1A1B15A2B2C2D2AA1=5A1A2=5A2B1=A1B1A1A2=65=1AB1=AA1+A1A2+A2B1=5+5+1=11AB25+5+6=16AB1=25+1=11AB2=35+1=16ABn=n+15+1=56n=1010AA1=5A1A2=51MABCAMDBMCDMB1cm/s2cm/sBA1AB=10cmCD2sAC+MD2CDMD=2ACAM=AB32NABANBN=MN1CMBD2CDBD=2MCMD=2ACMB=2AMAM=AB3NABNAB1CD2sCM=2cmBD=4cmAB=10cmCM=2cmBD=4cmAC+MD=ABCMBD=1024=4cm2CDBD=2MCMD=2ACBD+MD=2MC+ACMB=2AMAM+BM=ABAM+2AM=ABAM=AB3NABANBN=MNANAM=MNBN=AM=ABMN=AB=NABANBN=MNANBN=ABMN=AB=1=12ABC241010AC4/6/12ABC401x342yABC40ABBC1x4x+6x=34x=3.443.4=13.624+13.6=10.410.42yABC40BAC14+20=3440ABC14+34=4840CAB34+20=5440ABBCAB4y+144y+144y+20=40y=2BC4y+4y14+344y=40y=5A2y24+424y10626y24+424y=10626yy=724+424y=4410626y=44A5y24+454y10656y24+454y=10656yy=8A2443720km1120km/h80km/h20min=+=2x120x=80x+1x=23yy1120y1+80y=7202y=883=55411COABOOEOFAOCBOCEOF22AOC=BOD=80OEOFAODBOCEOF3AOC=BOD=BODOOCODOEOFAODBOC+180EOC=1AOC=BOC=902EOD=AOD=80+=40+COF=BOC=80+=40+32AOD=+DOE=+1COABAOC=BOC=90OEAOCEOC=AOC=90=45OFBOCCOF=BOC=90=45EOF=EOC+COF=45+45=902OEAODEOD=AOD=80+=40+OFBOCCOF=BOC=80+=40+COE=EODCOD=40+=40EOF=COE+COF=40+40+=8032AOC=BOD=COD=AOD=+OEAODDOE=+COE=DOECOD==3AOC=BOD=COD=AOD=+OEAODDOE=COE=DOE+COD=5AOB=90OOBBOCAOCBOCOMON11OCAOBBOC=30MON=45BOC=nMON=4522OCAOBBOCMON32BOCBOC3MON1MOANOAMOANOA2MOANOA3MOANOA1AOB=90BOC=30AOC=60OMONAOCBOCCOM=AOCBOCMON=COM+CON=AOB=4545AOB=90BOC=nAOC=90nOMONAOCBOCCOM=AOC=90nBOC=nMON=COM+CON=AOB=45452AOB=90BOC=AOC=90+OMONAOCBOCCOM=AOCBOCMON=COMCON=AOB=453OMONAOCBOCCOM=AOCBOCMON=COM+CON=AOC+BOC=36090=135COMCON6AOB=120OCOAO20ODOBO5OCODt0t151tOCOD2tOCOD3OCODOCOBODt1OCOD20t=5t+120t2OCOD20t+90=120+5t20t90=120+5tt3OBOCOD120t=5t+120t=8t=8minOCOD220t+90=120+5t20t90=120+5tt=2t=14t=2mint=14minOCOD312020t=5t20t120=5t+12020t20t1205t=5tt=4.8t=t=12OBt4.8minOCtminODt12min7AOBOAPO18cmMMOOB2cm/sQOOB1cm/sPQts1PMOPO=cmt2PMOtOP=OQ3QO16cmNQPQt83060PAPBMNPACPBDP1DPC=902PACPAPNPPFAPDPECPDEPF3PACPAPNP3/PBDPBPMP2/PCPMtBPN=1802tCPD=90ttBPN+CPD13060DPC=180CPADPB2CPE=DPE=xCPF=yAPF=DPF=2x+yCPA=603tBPM=2tCPDBPN1DPC=180CPADPBCPA=60DPB=30DPC=1803060=902CPE=DPE=xCPF=yAPF=DPF=2x+yCPA=60y+2x+y=60x+y=30EPF=x+y=303tBPM=2tBPN=1802tDPM=302tAPN=3tCPD=180DPMCPAAPN=90t==BPN+CPD=1802t+90t=2703tBPN+CPD1802t90t