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共找到 1840 与AT-A 相关的结果，耗时31 ms
正交矩阵是否能证明对称,有一题如下 对于任意正交矩阵A,AAT=ATA=E,证明|E-A^2|=0.本人认为可这样解,|E-A^2|=|A
AT-A
^2|=|A（
AT-A
）|=|A||
AT-A
|=0,|A|不等于0,对于任意A,|
AT-A
|=0,也可用举例法,可以证明只
数学
AT=A时,才有|AT-A|
谁有A man didn"t sleep at home one night,the next day he told his wife that he had slept at a budd我要的是A man didn"t sleep at home one nig
英语
t，the next day
at a year at one year at a time at one time 这几组词怎么区分
英语
设A为实方针,证明（1）如果A=At（转置矩阵）,且A^2=O,则A=O；（2）如果A*AT=O,且AT*A=O,则A=O.
数学
Two ferries start at the same time from opposite sides of a river.Each travels at a constant speed,but one is faster than the other .T
英语
ey pass at a p
The train traves at a speed of 80 kilometres per hour 向划线部分(at a speed向at a speed of 80 kilometres per hour 提问
英语
She wants to study English and she is going to study economics _______.A.at a time B.at times C.at the same time
英语
Don’t all speak at once!_________,please .A.Each at one time B.One by one time C.One for eachh time Done at a time答案是D为什么不选C
英语
I don’t know anybody who can do three things at the same time and do them well.Do one task at a time or two tasks at a time.That’s it.
英语
k,two works be
don't all speak at once!_please.A.Each at one timeB.One by one timeC.One for each tineD.One at a time是D,但是C为什么不对关键是C为什么不对。。。
英语
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