简答题:求R<img src="http://www.weimei168.com/uploads/202208/161267160110721.png" width="14" height="25" />中由向量组<img src="http://www.weimei168.com/uploads/202208/161267160759841.png" width="20" height="29" />=(1，1，2，1)<img src="http://www.weimei168.com/uploads/202208/161267161571531.png" width="14" height="25" />，<img src="http://www.weimei168.com/uploads/202208/161267162440211.png" width="24" height="29" />=(0，1，-1，0)<img src="http://www.weimei168.com/uploads/202208/161267161571531.png" width="14" height="25" />，<img src="http://www.weimei168.com/uploads/202208/161267163715631.png" width="22" height="30" />=(-1，1，1，0)<img src="http://www.weimei168.com/uploads/202208/161267161571531.png" width="14" height="25" />，<img src="http://www.weimei168.com/uploads/202208/161267164283641.png" width="24" height="29" />=(2，1，-1，3)<img src="http://www.weimei168.com/uploads/202208/161267161571531.png" width="14" height="25" />生成的子空间的基和维数．