设向量\( \alpha = (1,1,{\rm{1}}) \),则\( \alpha {\alpha ^{\rm T}} = \) ______
举一反三
- 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\( \alpha = (0,1,2,3) \),则 \( \alpha {\alpha ^{\rm T}} = \)______
- 设向量 \( \alpha = (1,1,2) \),则 \( \alpha {\alpha ^{\rm T}} = \)______ .
- 设\( \alpha {\rm{ = }}{\left( {1,0,1} \right)^T},\,A = \alpha {\alpha ^T} \),则\( \left| A \right|{\rm{ = }} \)______
- 设\( \alpha {\rm{ = }}\left( {\matrix{ 1 \cr 0 \cr 1 \cr } } \right)\;A = \alpha {\alpha ^{T,}} \) ,则\( \left| {I - {A^n}} \right| = \) ( ) A: \( 1 + {2^n} \) B: \( 1 - {2^n} \) C: \( 1 + {3^n} \) D: \( 1 - {3^n} \)