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设
https://assets.asklib.com/psource/2016030117265974615.jpg
均为n维列向量,A是m×n矩阵,下列选项正确的是()。
A . ['若https://assets.asklib.com/psource/2016030117270153990.jpg
线性相关,则https://assets.asklib.com/psource/2016030117270247876.jpg
线性相关。B . 若https://assets.asklib.com/psource/2016030117270153990.jpg
线性相关,则https://assets.asklib.com/psource/2016030117270247876.jpg
线性无关。C . 若https://assets.asklib.com/psource/2016030117270153990.jpg
线性无关,则https://assets.asklib.com/psource/2016030117270247876.jpg
线性相关。D . 若https://assets.asklib.com/psource/2016030117270153990.jpg
线性无关,则https://assets.asklib.com/psource/2016030117270247876.jpg
线性无关。
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设A是m阶矩阵,B是n阶矩阵,行列式等于()。
A . ['-|A||B|B . |A||B|C .https://assets.asklib.com/psource/2015103009113286317.jpg
D .https://assets.asklib.com/psource/2015103009114584055.jpg
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已知3维列向量α,β满足αTβ=3,设3阶矩阵A=βαT,则()。
A . β是A的属于特征值0的特征向量
B . α是A的属于特征值0的特征向量
C . β是A的属于特征值3的特征向量
D . α是A的属于特征值3的特征向量
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设4阶行列式
https://assets.asklib.com/psource/2015102914251882239.jpg
则D等于().
A . a2d2-b2c2
B . (ad-bC.2
C . (ab-cD.2
D . a2b2-c2d2
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设向量组A是由5个3维向量构成, 若向量组A中任意3个向量构成的行列式均为零, 则向量组A的秩不大于2.
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设A为n阶方阵,且A的行列式为零,则
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设A是n阶矩阵,且A的行列式|A|=0,则A中
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设三阶矩阵,,其中均为三维行向量,已知,,则( ).http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/33aa20d67e79432990e95faddb0c9530.png
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设3阶矩阵A的特征值为2,3, ,若行列式 则 =______.http://p.ananas.chaoxing.com/star3/origin/234d645fdde2e5ef4795f675cd421b5c.png
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设A为m阶方阵,B为n阶方阵,且已知|A|=a,|B|=b,则行列式=______.
设A为m阶方阵,B为n阶方阵,且已知|A|=a,|B|=b,则行列式<img src='https://img2.soutiyun.com/ask/uploadfile/6117001-6120000/5f03c2d915481df5a2dde5680f739bb0.jpg' />=______.
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设A∈Mn(K)是可逆矩阵,X,Y为n维列向量,证明:
设A∈Mn(K)是可逆矩阵,X,Y为n维列向量,证明:
<img src='https://img2.soutiyun.com/ask/2020-08-01/965167100548047.png' />
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已知四阶方阵均为4维列向量, 其中线性无关,如果践性方程组Ax=β的通解。
已知四阶方阵<img src='https://img2.soutiyun.com/ask/2020-12-17/977062250149874.png' />均为4维列向量, 其中<img src='https://img2.soutiyun.com/ask/2020-12-17/977062273180191.png' />线性无关,<img src='https://img2.soutiyun.com/ask/2020-12-17/977062300338745.png' /><img src='https://img2.soutiyun.com/ask/2020-12-17/977062313964524.png' />如果<img src='https://img2.soutiyun.com/ask/2020-12-17/977062333777657.png' />践性方程组Ax=β的通解。
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线性代数证明题
设a为n维列向量,A为n阶正交矩阵,证明‖Aa‖=‖a‖
证明:因为A为n阶正交矩阵,所以‖A‖=1
‖Aa‖=‖A‖‖a‖=‖a‖
所以当a为n维列向量,A为n阶正交矩阵时,‖Aa‖=‖a‖
请问这个证明哪错了?..急
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设x为n维列向量,x'x=1,令H=E-2xx',求证H是对称的正交矩阵。
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设A<sub>j</sub>表示四阶行列式 的第j列(j=1,2,3, 4),已知|a<sub>ij</sub>|=-2,那么
A.A.3
B.B.6
C.C.-6
D.D.-2
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已知4维列向量组a<sub>1</sub>,a<sub>2</sub>,a<sub>3</sub>,a<sub>4</sub>线性无关,则下列向量组中线性无关的是().
A.<img src='https://img2.soutiyun.com/ask/2021-03-04/983720893957208.png' />
B.<img src='https://img2.soutiyun.com/ask/2021-03-04/983720900590587.png' />
C.<img src='https://img2.soutiyun.com/ask/2021-03-04/983720906678935.png' />
D.<img src='https://img2.soutiyun.com/ask/2021-03-04/983720913180307.png' />
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设a为n维列向量,A为n阶正交矩阵,证明:||Aa||-||a||.
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设[图]均为n维列向量,A是m×n矩阵,下列选项正确的是()。...
设<img src='https://img2.soutiyun.com/shangxueba/ask/17661001-17664000/17661044/2016030117265974615.jpg' />均为n维列向量,A是m×n矩阵,下列选项正确的是()。
A.['若<img src='https://img2.soutiyun.com/shangxueba/ask/17661001-17664000/17661044/2016030117270153990.jpg' />线性相关,则<img src='https://img2.soutiyun.com/shangxueba/ask/17661001-17664000/17661044/2016030117270247876.jpg' />线性相关。
B. 若<img src='https://img2.soutiyun.com/shangxueba/ask/17661001-17664000/17661044/2016030117270153990.jpg' />线性相关,则<img src='https://img2.soutiyun.com/shangxueba/ask/17661001-17664000/17661044/2016030117270247876.jpg' />线性无关。
C. 若<img src='https://img2.soutiyun.com/shangxueba/ask/17661001-17664000/17661044/2016030117270153990.jpg' />线性无关,则<img src='https://img2.soutiyun.com/shangxueba/ask/17661001-17664000/17661044/2016030117270247876.jpg' />线性相关。
D. 若<img src='https://img2.soutiyun.com/shangxueba/ask/17661001-17664000/17661044/2016030117270153990.jpg' />线性无关,则<img src='https://img2.soutiyun.com/shangxueba/ask/17661001-17664000/17661044/2016030117270247876.jpg' />线性无关。
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设4阶行列式则
设4阶行列式<img src='https://img2.soutiyun.com/ask/2020-12-18/977137392667845.png' />则<img src='https://img2.soutiyun.com/ask/2020-12-18/977137400742306.png' />
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已知均为4维列向量。且则=_______
已知<img src='https://img2.soutiyun.com/ask/2021-03-04/983701575435251.png' />均为4维列向量。且<img src='https://img2.soutiyun.com/ask/2021-03-04/983701592989255.png' />则<img src='https://img2.soutiyun.com/ask/2021-03-04/98370160040768.png' />=_______
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4、设方阵 A 的行列式 |A| = 0 ,则 A 中
A.必有两列成比例
B.必有一列元素为 0
C.必有一列向量是其余列向量的线性组合。
D.任一列向量是其余列向量的线性组合
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设,B为三阶方阵,且行列式是A的伴随矩阵,则行列式等于()
A.1
B.-1
C.2
D.-2
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已知3阶矩阵A与B相似,A的特征值为1/2,1/3,1/4,求行列式|B<sup>-1</sup>-E|的值。
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设A为四阶矩阵,已知|A|=a≠0,计算行列式det(A*|A)