6、一个7×5的矩阵如果各列线性无关,则它的秩=________
( )

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)

28、设 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/03dc2fa866de121c60079e7c3c0c1ec8.png" ＼* MERGEFORMATINET 为齐次线性方程组 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/181683" ＼* MERGEFORMATINET 的解, INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/0ec1c289289586c124842686f7b692a5.png" ＼* MERGEFORMATINET 为非齐次线性方程组 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/23856" ＼* MERGEFORMATINET 的解,则( )
(1.0)

27、下列说法正确的是( )
(1.0)

26、某线性方程组的增广矩阵已经由行变换化为以下形式.

25、将坐标处理成列向量的形式,则绕原点逆时针旋转θ,则旋转矩阵 INCLUDEPICTURE ＼d "http://p.ananas.chaoxing.com/star3/origin/7306824af62074b8f1c82f4ed362cce4.png" ＼* MERGEFORMATINET 中的b为( )
(1.0)