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若矩阵,B是3阶非零矩阵,满足AB=0,则t=______.
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已知2维非零向量α不是2阶方阵A的特征向量.若αA满足A2α+Aα-6α=0求A的全部特征值并由此判
Ⅰ设AB均为n阶非零矩阵且A2+A=0B2+B=0证明λ=-1必是矩阵A与B的特征值Ⅱ若AB=BA=
若任一n维非零列向量都是n阶矩阵A的特征向量证明A是数量矩阵即A=kE层是n阶单位矩阵.
已知A为三阶矩阵α1α2为Ax=0的基础解系又AB=2BB为三阶非零矩阵Ⅰ计算行列式|A+E|Ⅱ求γ
设A是n阶反对称矩阵Ⅰ证明对任何n维列向量α恒有αTAα=0Ⅱ证明对任何非零常数c矩阵A+cE恒可逆
若矩阵B是3阶非零矩阵满足AB=0则t=______.
若任一n维非零列向量都是n阶矩阵A的特征向量证明A是数量矩阵即A=kEE是n阶单位矩阵.
若矩阵B是3阶非零矩阵满足AB=0则t=______.
已知A是3阶非零矩阵用矩阵A中各行元素之和均为0又知AB=0其中B=[*]则齐次方程组Ax=0的通解
设AB均为n阶非零矩阵且满足A2+A=0B2+B=0证明若AB=BA=0ξ1ξ2分别是AB的对应于特
若任一n维非零列向量都是n阶矩阵A的特征向量证明A是数量矩阵即A=kEE是n阶单位矩阵.
设AB均为n阶反对称矩阵Ⅰ证明对任何n维列向量a恒有aTAa=0Ⅱ证明对任何非零实数k恒有A-kE是
已知A为三阶矩阵α1α2为Ax=0的基础解系又AB=2BB为三阶非零矩阵.Ⅰ计算行列式|A+E|Ⅱ求
1设A曰均为n阶非零矩阵且A2+A=B2+B=0证明λ=-1必是矩阵A与B的特征值2若AB=BA=0
已知A和B都是n阶非零矩阵且A2+2A=0B2+2B=01证明λ=-2必是矩阵A和B的特征值2如果A
设αβ都是n维非零列向量矩阵A=2E-αβT其中E是n阶单位矩阵.若A2=A+2E则αTβ=____
设AB及A*都是nn≥3阶非零矩阵且ATB=0则rB等于
1
2
3
若矩阵B是3阶非零矩阵满足AB=0则t=______.
设n阶矩阵A满足AAT=EE是n阶单位矩阵AT是A的转置若|A|<0则|A+E|=______.
已知2维非零向量α不是2阶方阵A的特征向量.Ⅰ证明αAα线性无关Ⅱ若αA满足A2α+Aα-6α=0求
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设f'x在[01]连续求证级数收敛.
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设fx在包含原点在内的某区间ab内有二阶导数且a<x<b证明fx≥xa<x<b.
InreadingthepagesofAmericanScientistIhavebeenstruckbythestunningprogressbeingmadeinscienceandengineeringnewphenomenadiscoverednewmaterialssynthesized用合成法合成newmethodsdeveloped.46WhatIseebehindmanyoftheseexcitingstoriesisthewidespreadandevenrevolutionaryuseofdistributedintelligencethatismadepossiblebythewiringofthescientificcommunity.Itismorethanatimesaveroracommunicationenhance;itisenablingustothinkinnewwaysanditsimpactonsocietymaybemonumental.Theterminformationageprobablydoesnotdojusticetothepossibilitiesofthisemergingera.47Thisisanageofknowledgeanddistributedintelligenceinwhichknowledgeisavailabletoanyonelocatedanywhereatanytime;andinwhichpowerinformationandcontrolaremovingfromcentralizedsystemstoindividuals.Thiseracallsforanewformofleadershipandvisionfromtheacademicscienceandengineeringcommunity.Weknowfromcountlessexamplesthattheacademicscienceandtheengineeringhaveenabledoursocietytomakethemostofnewtechnologies.Wewouldn’thavetoday’sadvancedcomputergraphicssystemsifmathematicianshadn’tbeenabletosolveproblemsrelatedtosurfacegeometry.48Wewouldn’thavenetworkscapableofhandlingmassiveamountsofdataifphysicistsandastronomershadn’tcontinuouslyforgedtoolstolookmoredeeplyintosubatomicstructuresandthecosmos.Chemists’effortstosimulatecomplexphenomenaandpredictthepropertiesofmanyelectronsystemshaveinspiredmassivelyparallelarchitecturesforcomputing.Andtheinformationmadeavailablebythesequencingofthehumangenome基因组hascausedustorethinkhowtostoremanipulateandretrievedatamosteffectively.49Itwilltakenewinsightsfromstudiesofhumancognitionlinguisticsneurobiologycomputingandmoretodevelopsystemsthattrulyaugmentourcapacitytolearnandcreate.Thebestmaybeyettocome.DespitebrutallytightconstraintsonfederaldiscretionaryspendingPresidentClintonhassteppedforwardtochampiona3percentincreaseuncorrectedforinflationinthenational1998budget.Thepresident’srequestisonlythefirststepinthecongressionalbudgetprocessahead.50GiventhattheprioritiesofCongresswillalmostcertainlydifferfromthoseofthepresidentitwilltakeanunprecedentedlevelofinputandcommitmentfromtheresearchcommunitytoensuretheinvestmentsinscienceandengineering.
求曲线x2+3xy+y2+1=0在点M02-1处的切线方程与法线方程.
设x∈01证明不等式
InreadingthepagesofAmericanScientistIhavebeenstruckbythestunningprogressbeingmadeinscienceandengineeringnewphenomenadiscoverednewmaterialssynthesized用合成法合成newmethodsdeveloped.46WhatIseebehindmanyoftheseexcitingstoriesisthewidespreadandevenrevolutionaryuseofdistributedintelligencethatismadepossiblebythewiringofthescientificcommunity.Itismorethanatimesaveroracommunicationenhance;itisenablingustothinkinnewwaysanditsimpactonsocietymaybemonumental.Theterminformationageprobablydoesnotdojusticetothepossibilitiesofthisemergingera.47Thisisanageofknowledgeanddistributedintelligenceinwhichknowledgeisavailabletoanyonelocatedanywhereatanytime;andinwhichpowerinformationandcontrolaremovingfromcentralizedsystemstoindividuals.Thiseracallsforanewformofleadershipandvisionfromtheacademicscienceandengineeringcommunity.Weknowfromcountlessexamplesthattheacademicscienceandtheengineeringhaveenabledoursocietytomakethemostofnewtechnologies.Wewouldn’thavetoday’sadvancedcomputergraphicssystemsifmathematicianshadn’tbeenabletosolveproblemsrelatedtosurfacegeometry.48Wewouldn’thavenetworkscapableofhandlingmassiveamountsofdataifphysicistsandastronomershadn’tcontinuouslyforgedtoolstolookmoredeeplyintosubatomicstructuresandthecosmos.Chemists’effortstosimulatecomplexphenomenaandpredictthepropertiesofmanyelectronsystemshaveinspiredmassivelyparallelarchitecturesforcomputing.Andtheinformationmadeavailablebythesequencingofthehumangenome基因组hascausedustorethinkhowtostoremanipulateandretrievedatamosteffectively.49Itwilltakenewinsightsfromstudiesofhumancognitionlinguisticsneurobiologycomputingandmoretodevelopsystemsthattrulyaugmentourcapacitytolearnandcreate.Thebestmaybeyettocome.DespitebrutallytightconstraintsonfederaldiscretionaryspendingPresidentClintonhassteppedforwardtochampiona3percentincreaseuncorrectedforinflationinthenational1998budget.Thepresident’srequestisonlythefirststepinthecongressionalbudgetprocessahead.50GiventhattheprioritiesofCongresswillalmostcertainlydifferfromthoseofthepresidentitwilltakeanunprecedentedlevelofinputandcommitmentfromtheresearchcommunitytoensuretheinvestmentsinscienceandengineering.
已知fx可微且满足方程求fx.
设z=zxy由方程sin2x+sin2y-z=ψx+y+z所确定的函数ψ有连续的二阶导数且ψ'≠1Ⅰ求dzⅡ记
设a>0证明不等式
设θ满足.
求连续函数fx使它满足①
设abp为非零常数求.
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求累次积分
求其中D由直线x=ax=0y=ay=-a及曲线x2+y2=axa>0所围.
设求.
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设fx在[02π]上具有一阶连续导数且f'x≥0证明对于任何正整数n有
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求数列极限其中.
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求下列幂謦数的收敛区间及收敛域
当x→0时都是无穷小量将它们按关于x的阶数从低到高的顺序排列.
设fx在[ab]上连续在ab内可导又b>a>0求证存在ξη∈ab使得
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