设A,B为正定阵,则( )。
A.AB,A+B都正定
B.AB正定,A+B非正定
C.AB非正定,A+B正定
D.AB不一定正定,A+B正定
正确答案是D
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明:本文由翰林刷题小程序授权发布,如需转载请注明出处。
本文链接:https://doc.20230611.cn/post/271889.html
上一篇:According to John Austin, p______ were sentence sentences that did not state a fact or describe a state and were not verifiable.
下一篇:黄庭坚在《小山词序》中称( )一生困于“四痴”。