Engineering Mathematics Question

• tanpantheon1

  1 Jun 17, 19:05

  Hi

  This is a question that appeared in my mid-semester 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

• MyPillowTalks

  3 Jun 17, 20:58

  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.
    

   

  

  

• tanpantheon1

  5 Jun 17, 13:54

  None of the matrices are given

  It is given to me that they are of m x  m order but they are not given,

  Yes this is a very general question but it is in my Mid Sem exam in EEE diploma

• tanpantheon1

  5 Jun 17, 13:56

  And thank you so much !

  That was the solution that I was looking for !

• MyPillowTalks

  5 Jun 17, 21:46

  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

• Online Assignment Helper

  10 Jun 17, 06:28

  .

• iamsea

  5 Sep 17, 19:47

  .

• MyPillowTalks

  6 Sep 17, 19:35

  In case you specialise in power Engineering in SP EEE, I wrote a solution for one of the past year questions recently.

  Verify with your lecturer on the accuracy of my solutions, hopefully my approach fits his requirements.

   

  

• supreme001

  29 Sep 17, 18:30

  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/math-help.html to get a more detailed explanation of a particular action in a real example, or just check the validity of my solutions.

• MobGeek

  11 Oct 17, 04:44

  Thanks.

• Paulwinter019

  12 Oct 17, 21:57

  Interesting kind of solution...

• Paulautumn020

  19 Oct 17, 20:11

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