简答题:设向量组<img src="http://www.weimei168.com/uploads/202208/161258440673231.png" width="20" height="29" />=(1，3，3，5)<img src="http://www.weimei168.com/uploads/202208/161258441213611.png" width="14" height="25" />，<img src="http://www.weimei168.com/uploads/202208/16125844213731.png" width="24" height="29" />=(1，2，1，3)<img src="http://www.weimei168.com/uploads/202208/161258441213611.png" width="14" height="25" />，<img src="http://www.weimei168.com/uploads/202208/1612584429331.png" width="22" height="30" />=(-3，一5，-1，-7)<img src="http://www.weimei168.com/uploads/202208/161258441213611.png" width="14" height="25" />,<img src="http://www.weimei168.com/uploads/202208/161258443629711.png" width="24" height="29" />=(1，1，-1，1)<img src="http://www.weimei168.com/uploads/202208/161258441213611.png" width="14" height="25" />，<img src="http://www.weimei168.com/uploads/202208/16125844431971.png" width="22" height="30" />=(4，5，-2，6)<img src="http://www.weimei168.com/uploads/202208/161258441213611.png" width="14" height="25" />． <br /> 求：(1)此向量组的一个极大无关组； <br /> (2)将其余的向量用此极大无关组线性表出．