A. 若 $a=0$，则 $\alpha_{1}$, $\alpha_{2}$, $\alpha_{3}$ 线性相关
B. 若 $a\neq0$，则 $\alpha_{1}$, $\alpha_{2}$, $\alpha_{3}$ 线性相关
C. 若 $a=1$，则 $\alpha_{1}$, $\alpha_{2}$, $\alpha_{3}$ 线性相关
D. 若 $a=0$，则 $\alpha_{3}$ 可由 $\alpha_{1}$, $\alpha_{2}$ 线性表出，且表示方式不唯一
3.判断题设向量beta可由向量组alpha_(1),alpha_(2),alpha_(3),alpha_(4)线性表示，但不能由alpha_(1),alpha
设alpha_(1),alpha_(2),alpha_(3),alpha_(4)线性无关，且alpha_(1),alpha_(2),alpha_(3),alph
设alpha_(1),alpha_(2),alpha_(3),alpha_(4)线性无关，且alpha_(1),alpha_(2),alpha_(3),alph
8.设向量alpha_(1)=(1,0,-2)^T，alpha_(2)=(0,0,1)^T，向量beta是alpha_(1),alpha_(2)的线性组合，则下
4.判断题向量β被向量组alpha_(1),alpha_(2),...,alpha_(n)线性表示，记A=[alpha_(1),alpha_(2),...,al
【例19】(2025-2)设矩阵A=(alpha_(1),alpha_(2),alpha_(3),alpha_(4)).若alpha_(1),alpha_(2)
设向量组alpha_(1)=(1,-1,2,4),alpha_(2)=(0,3,1,2),alpha_(3)=(3,0,7,14),alpha_(4)=(1,-
13.单选题若alpha_(1)=(1-1 2),alpha_(2)=(-2 1 0),alpha_(3)=(-1 0 t)线性相关,则()A. t=-2B.
判断题（共10题，每题2.00分）1.向量组alpha_(1)=(1,1,1,1),alpha_(2)=(1,1,1,0),alpha_(3)=(1,1,0,0
8 填空若beta=(1,2,t)^T可由向量组alpha_(1)=(2,1,1)^T,alpha_(2)=(-1,2,7)^T,alpha_(3)=(1,-1