I En+A I = I En+AT I 吗?为什么? 其中,En为单位矩阵,A为n阶矩阵,AT为A的转置矩阵.如题.谁能帮我证明下.还有,2个矩阵的和的行列式有没有什么拆分公式?

i piensa en usted. I En+A I = I En+AT I 吗?为什么? 其中,En为单位矩阵,A为n阶矩阵,AT为A的转置矩阵.如题.谁能帮我证明下.还有,2个矩阵的和的行列式有没有什么拆分公式? en,i will never forgive you...hoho i piensa en usted. 怎么发音 brther if you give up you can happy en i “I wish you the best of luck in the newyear .I hope you will haue a very en joyable stay...“I wish you the best of luck in the newyear .I hope you will haue a very en joyable 读音标,写字母ji：vi：eks eitf en a：d3ei si：i：kju： I am back in Brighton now after a great holiday with Rosie in Dubin .I really en-joyed 英语翻译alright,i will try text en mes for u.practice u en.keep working hard.learn more en is good for u. 英语翻译Dear Manager,I am a student from Beijing No.1 High School.I was born on May 1st in 1991 and I will graduate in July this year.I have studied English hard for six years because I am really interested in it.I am especially good at spoken En ORACLE语句 求 create or replace procedure findName(name emp.ename%type,en out number) as i number; begin select count(*) into i from emp where ename=name; if i=1 then en:=i; dbms_output.put_line('用户存在'); else en:=0; dbms_output.put_line(' Keep it to yourself,and i'll keep mines,en...Keep it to yourself,and i'll keep mines,en...请帮忙翻译这句英文, 英语翻译《玫瑰人生》(La Vie En Rose)　　Hold me close and hold me fast The magic spell you cast This is la vie en rose When you kiss me,Heaven sighs And though I close my eyes I see la vie en rose When you press me to your heart Im in a My hero is a doctor,who save my life when I could have died.In fact,she has saved quite a fewchildren's lives.At the age of five,I was serious ill and my life was in danger.Myparents were all worried if I could recover from the disease,I was lucky en My hero is a doctor,who save my life when I could have died.In fact,she has saved quite a fewchildren's lives.At the age of five,I was serious ill and my life was in danger.Myparents were all worried if I could recover from the disease,I was lucky en im away just cause i piensa en usted请问这句话的意思... 关于复数最小值的问题若复数满足|z+i|-|z|=1,则|z+1+i|的最小值为多少?en ..很好。 many,any,banning,animal,怎么发音?many(me-ni,men-ni,men )any(e-ni,en-ni,en-i?)banning(ba-nning,ban-ning,bann-ing?)animal(a-nimal,an-nimal,an-imal?)