4.(判断题) 向量组满足 beta_(1)=alpha_(1), beta_(2)=alpha_(1)+alpha_(2), beta_(3)=alpha_(1)+alpha_(2)+alpha_(3), 则向量组 alpha_(1), alpha_(2), alpha_(3) 与向量组 beta_(1), beta_(2), beta_(3) 等价。A 对B 错

4.(判断题) 向量组满足 $\beta_{1}=\alpha_{1}, \beta_{2}=\alpha_{1}+\alpha_{2}, \beta_{3}=\alpha_{1}+\alpha_{2}+\alpha_{3},$ 则向量组 $\alpha_{1}, \alpha_{2}, \alpha_{3}$ 与向量组 $\beta_{1}, \beta_{2}, \beta_{3}$ 等价。 A 对 B 错

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