4、判断 设向量 alpha =-|||-A-|||-B x

设向量组 alpha_1, alpha_2, alpha_3线性无关，判断向量组 beta_1 = alpha_1 + alpha_2、beta_2 =

设向量组alpha_1, alpha_2, alpha_3, alpha_4线性无关，则()。设向量组$\alpha_1, \alpha_2, \alpha_3

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设 alpha=} 1 1 2 的特征向量，则 x+y= ( ).设 $\alpha=\begin{pmatrix} 1 \\ 1 \\ 2 \end{p

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11 判断设 -t(n) ,如果 (|X|geqslant k)=2alpha , 则 (Xlt k)=1-alpha .-|||-A.X-|||-B.

设向量组 alpha_1, alpha_2, alpha_3, alpha_4，其中 alpha_1, alpha_2, alpha_3 线性无关，则必有（）A

向量组 alpha_2, alpha_4, alpha_5 线性无关，则整体向量组 alpha_1, alpha_2, alpha_3, alpha_4, al