设有向量组`\alpha _1, \alpha _2, \alpha _3, \alpha _4`,则向量组`\alpha _1 + \alpha _2,\alpha _2 + \alpha _3,\alpha _3 + \alpha _4,\alpha _4 + \alpha _1`( )
设有向量组`\alpha _1, \alpha _2, \alpha _3, \alpha _4`,则向量组`\alpha _1 + \alpha _2,\alpha _2 + \alpha _3,\alpha _3 + \alpha _4,\alpha _4 + \alpha _1`( )
设`n\times 3`的矩阵`A`的秩为3,则下列向量组线性无关的是( ) A: `\alpha _1 + \alpha _2,\alpha _2 + \alpha _3,\alpha _3 + \alpha _1`; B: `\alpha _2 - \alpha _1,\alpha _3 - \alpha _2,\alpha _1 - \alpha _3`; C: `\alpha _1 + \alpha _2 + \alpha _3,\alpha _3 - \alpha _2, - \alpha _1 - 2\alpha _3`; D: `2\alpha _2 - \alpha _1,2\alpha _3 - \alpha _2,\alpha _1 - \alpha _3`.
设`n\times 3`的矩阵`A`的秩为3,则下列向量组线性无关的是( ) A: `\alpha _1 + \alpha _2,\alpha _2 + \alpha _3,\alpha _3 + \alpha _1`; B: `\alpha _2 - \alpha _1,\alpha _3 - \alpha _2,\alpha _1 - \alpha _3`; C: `\alpha _1 + \alpha _2 + \alpha _3,\alpha _3 - \alpha _2, - \alpha _1 - 2\alpha _3`; D: `2\alpha _2 - \alpha _1,2\alpha _3 - \alpha _2,\alpha _1 - \alpha _3`.
设向量组\( {\alpha _1},{\alpha _2},{\alpha _3} \)线性无关,则下列向量组中线性无关的是( ) A: \( {\alpha _1}{\rm{ + }}{\alpha _2},{\alpha _2}{\rm{ + }}{\alpha _3},{\alpha _3} - {\alpha _1} \) B: \( {\alpha _1}{\rm{ + }}{\alpha _2},{\alpha _2}{\rm{ + }}{\alpha _3},{\alpha _1}{\rm{ + 2}}{\alpha _2}{\rm{ + }}{\alpha _3} \) C: \( {\alpha _1}{\rm{ + }}2{\alpha _2},2{\alpha _2}{\rm{ + }}3{\alpha _3},3{\alpha _3}{\rm{ + }}{\alpha _1} \) D: \( {\alpha _1}{\rm{ + }}{\alpha _2}{\rm{ + }}{\alpha _3},2{\alpha _1} - 3{\alpha _2}{\rm{ + }}22{\alpha _3},3{\alpha _1}{\rm{ + 5}}{\alpha _2} - 5{\alpha _3} \)
设向量组\( {\alpha _1},{\alpha _2},{\alpha _3} \)线性无关,则下列向量组中线性无关的是( ) A: \( {\alpha _1}{\rm{ + }}{\alpha _2},{\alpha _2}{\rm{ + }}{\alpha _3},{\alpha _3} - {\alpha _1} \) B: \( {\alpha _1}{\rm{ + }}{\alpha _2},{\alpha _2}{\rm{ + }}{\alpha _3},{\alpha _1}{\rm{ + 2}}{\alpha _2}{\rm{ + }}{\alpha _3} \) C: \( {\alpha _1}{\rm{ + }}2{\alpha _2},2{\alpha _2}{\rm{ + }}3{\alpha _3},3{\alpha _3}{\rm{ + }}{\alpha _1} \) D: \( {\alpha _1}{\rm{ + }}{\alpha _2}{\rm{ + }}{\alpha _3},2{\alpha _1} - 3{\alpha _2}{\rm{ + }}22{\alpha _3},3{\alpha _1}{\rm{ + 5}}{\alpha _2} - 5{\alpha _3} \)
`\alpha _j`为四阶行列式D的第j列,(j=1,2,3,4,),且D=-5,则下列行列式中,等于-10的是( ) A: \[\left| {2{\alpha _1},2{\alpha _2},2{\alpha _3},2{\alpha _4}} \right|\] B: \[\left| {{\alpha _1} + {\alpha _2},{\alpha _2} + {\alpha _3},{\alpha _3} + {\alpha _4},{\alpha _4} + {\alpha _1}} \right|\] C: \[\left| {{\alpha _1},{\alpha _1} + {\alpha _2},{\alpha _1} + {\alpha _2} + {\alpha _3},{\alpha _1} + {\alpha _2} + {\alpha _3} + {\alpha _4}} \right|\] D: \[\left| {{\alpha _1} + {\alpha _2},{\alpha _2} + {\alpha _3},{\alpha _3} + {\alpha _4},{\alpha _4} - {\alpha _1}} \right|\]
`\alpha _j`为四阶行列式D的第j列,(j=1,2,3,4,),且D=-5,则下列行列式中,等于-10的是( ) A: \[\left| {2{\alpha _1},2{\alpha _2},2{\alpha _3},2{\alpha _4}} \right|\] B: \[\left| {{\alpha _1} + {\alpha _2},{\alpha _2} + {\alpha _3},{\alpha _3} + {\alpha _4},{\alpha _4} + {\alpha _1}} \right|\] C: \[\left| {{\alpha _1},{\alpha _1} + {\alpha _2},{\alpha _1} + {\alpha _2} + {\alpha _3},{\alpha _1} + {\alpha _2} + {\alpha _3} + {\alpha _4}} \right|\] D: \[\left| {{\alpha _1} + {\alpha _2},{\alpha _2} + {\alpha _3},{\alpha _3} + {\alpha _4},{\alpha _4} - {\alpha _1}} \right|\]
According to the passage, to do the "effect to effect" reasoning is to reason _____. A: from cause to effect B: from effect to cause C: from effect to effect and on to cause D: from effect to cause and on to another effect
According to the passage, to do the "effect to effect" reasoning is to reason _____. A: from cause to effect B: from effect to cause C: from effect to effect and on to cause D: from effect to cause and on to another effect
设有向量组`\alpha _1, \alpha _2, \alpha _3, \alpha _4`,则向量组`\alpha _1 + \alpha _2,\alpha _2 + \alpha _3,\alpha _3 + \alpha _4,\alpha _4 + \alpha _1`( ) A: 线性相关; B: 线性无关; C: 可能线性无关; D: 以上都不对。
设有向量组`\alpha _1, \alpha _2, \alpha _3, \alpha _4`,则向量组`\alpha _1 + \alpha _2,\alpha _2 + \alpha _3,\alpha _3 + \alpha _4,\alpha _4 + \alpha _1`( ) A: 线性相关; B: 线性无关; C: 可能线性无关; D: 以上都不对。
已知`\ alpha _1,alpha _2,alpha _3,beta , gamma `均为4维列向量,且`\| gamma ,alpha _1,alpha _2,alpha _3 | = n,| alpha _1,beta + gamma ,alpha _2,alpha _3| = m`,则`\| alpha _1,alpha _2,alpha _3,3beta |` ( ) </p></p>
已知`\ alpha _1,alpha _2,alpha _3,beta , gamma `均为4维列向量,且`\| gamma ,alpha _1,alpha _2,alpha _3 | = n,| alpha _1,beta + gamma ,alpha _2,alpha _3| = m`,则`\| alpha _1,alpha _2,alpha _3,3beta |` ( ) </p></p>
The new law has come into _____; surely it will have _____on industry of the country. A: affect; an effect B: effect; affect C: effect; an effect D: an effect; an effect
The new law has come into _____; surely it will have _____on industry of the country. A: affect; an effect B: effect; affect C: effect; an effect D: an effect; an effect
向量组\({\alpha _1} = {\left( {1,1,1} \right)^T}{\kern 1pt} ,\;{\alpha _2} = {\left( {2,3,4} \right)^T},\,{\alpha _3} = {\left( {3,2,3} \right)^T},{\alpha _4} = {\left( {4,3,4} \right)^T}\)的一个极大无关组是( ) A: \({\alpha _1}\,,{\alpha _2}\) B: \({\alpha _1}\,,{\alpha _2},{\alpha _3}\) C: \({\alpha _2},{\alpha _3}\) D: \({\alpha _1}\,{\alpha _3}\)
向量组\({\alpha _1} = {\left( {1,1,1} \right)^T}{\kern 1pt} ,\;{\alpha _2} = {\left( {2,3,4} \right)^T},\,{\alpha _3} = {\left( {3,2,3} \right)^T},{\alpha _4} = {\left( {4,3,4} \right)^T}\)的一个极大无关组是( ) A: \({\alpha _1}\,,{\alpha _2}\) B: \({\alpha _1}\,,{\alpha _2},{\alpha _3}\) C: \({\alpha _2},{\alpha _3}\) D: \({\alpha _1}\,{\alpha _3}\)
若`\alpha _1,alpha _2,alpha _3,beta _1,beta _2`都是四维列向量, 且四阶行列式`\| alpha _1,alpha _2,alpha _3,beta_1 | = m,| alpha _1,alpha _2,beta_2,alpha _3 | = n` 则`\| 2alpha _1,2alpha _2,2alpha _3,2(beta_1+beta_2) | =` ( ) A: `\ (m+n)` B: `\ 8(m-n)` C: `\ 8(m+n)` D: `\ (m-n)`
若`\alpha _1,alpha _2,alpha _3,beta _1,beta _2`都是四维列向量, 且四阶行列式`\| alpha _1,alpha _2,alpha _3,beta_1 | = m,| alpha _1,alpha _2,beta_2,alpha _3 | = n` 则`\| 2alpha _1,2alpha _2,2alpha _3,2(beta_1+beta_2) | =` ( ) A: `\ (m+n)` B: `\ 8(m-n)` C: `\ 8(m+n)` D: `\ (m-n)`