设线性空间是形如的2阶实方阵全体的集合,则构成的子空间,其维数为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/6573fcdabb6e4209a75d5b69cdab5786.png
举一反三
- 设线性空间是形如的2阶实方阵全体的集合,则构成的子空间,其维数为（）。
- 设是元实系数非齐次线性方程组的解集合,则构成的子空间。（ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/e3510b4472ec42318963c974ac03b994.png
- 设为阶方阵，与等价，若已知，则（ ）.http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/90e1bd4de6364d3994affd98e10671c7.png
- 波长为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/91ddb92399a343cc990e393ea7ae49e4.png" />的单色光垂直入射于光栅常数为d、缝宽为a、总缝数为N的光栅上。取<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/d02f9b0d40604921bb6eba164d27ae52.png" />，则决定出现主极大的衍射角<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/294d963ff1564c7e9c98a2ca06a7278c.png" />的公式可写成（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/7e2fd47a37564a53afe33f3fadb46a41.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/2c25a6b55e74467992e1b3b1d02662d8.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/f852c846c7b642f6bbcaf2bcfa75c310.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/27465a93e5ca42d8a18f9a3222d0e52b.png" />
- 设一线性分组码的生成矩阵为，则其对应的监督矩阵为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/cc7b1d630aad40878639581f95f754d5.png