

Hi
This is a question that appeared in my midsemester test and I would like someone to explain it to me. Thanks in advance.
Given that the matrices A, B and X are m x m order and (I_m) is the identity matrix.
Solve for matrix X, the equation:
AX  BA = (I_m)
Edit: Matrix A, B and X are of m x m order
Edited by tanpantheon1 02 Jun `17, 2:51PM



Hello
It has been some time since I did engineering maths, I am quite rusty.
 Can I know if there are any values for Matrices A and B?
 Is this question asked in a general scenario?
 What level (Nitec/Higher Nitec/Diploma/Degree?) of engineering
maths is this question aimed at?
 My solution is as follows, may not be right/what you are looking for.
 I tried on MATLAB using a few "randomly made up" matrices for A
and B, and i solved for X using my solution. The value of X that i
found agrees with the equation (AX  BA = I_m)
given in the question.
Edited by MyPillowTalks 04 Jun `17, 7:31AM



No problem
I guess the question wants to test the student's knowledge on manipulating matrix equations, and wants the students to know that a matrix cannot be "divided", and have to use the inverse property.
I have added in some more details and fit the document into a single page pdf file and it can be downloaded here
Edited by MyPillowTalks 05 Jun `17, 9:46PM



I also believe that this task is aimed at testing knowledge on the manipulation of matrix equations. To solve matrix, I sometimes use the Wolfram Alpha application or website https://assignment.essayshark.com/mathhelp.html to get a more detailed explanation of a particular action in a real example, or just check the validity of my solutions.



请问你为什么不要问你学校的老师，反而问这里的人如何解答你所面对的难题？老师是教你那些知识的人，所以他最有资格帮助你解答难题，然而这里的人懂什么？这里的人都是临时找答案帮你解答难题的，所以他们给的答案即使正确也未必是最好的方案。最好还是问学校的老师比较好，因为他们怎么说是教你那些知识的人，而制作考试题目和改考卷的人也是他们。
如果遇到难题，就问学校老师吧。That’s what the tutorial session is for. Before the tutorial session, do the tutorial questions. Then as and when you encounter difficulty when doing the questions, you make a mark on those questions and ask your lecturer for help during the tutorial session.
Edited by Paulautumn020 19 Oct `17, 8:20PM
