7
第3空:
-1.5;-3/2
第4空:
-2
第5空:

38、设A是 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/111984" ＼* MERGEFORMATINET 矩阵,齐次线性方程组 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/181683" ＼* MERGEFORMATINET 仅有零解的充要条件是 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/53238" ＼* MERGEFORMATINET
(1.0)

37、 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/db5706add0f69f70ea1d4275830973b0.png" ＼* MERGEFORMATINET
(1.0)

36、 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/0834f7382644e447e6af07a60bfc4475.png" ＼* MERGEFORMATINET
(1.0)

35、下面不是阶梯型矩阵的是( )
(1.0)

34、设A是 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/111984" ＼* MERGEFORMATINET 矩阵,如果 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/312248" ＼* MERGEFORMATINET ,则( )
(1.0)

33、 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/844c729f4d5375eb545d734f5bd2c841.png" ＼* MERGEFORMATINET
(1.0)

32、下面向量组线性相关的是( )
(1.0)

31、
设线性方程组AX=b的增广矩阵( )经过初等行变换可化为 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/d5ce5ef9620d8230931c7482b2a8d78b.png" ＼* MERGEFORMATINET
t=-2时,下列说法正确的是
(1.0)

30、下列向量组是线性无关的是( )
(1.0)

29、设A是 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/111984" ＼* MERGEFORMATINET 矩阵, INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/23856" ＼* MERGEFORMATINET 有解,则( )
(1.0)