anonymous
  • anonymous
I'm so pissed off about this question. I think the answer was right but it said still wrong.. I need to make sure the answer before I will email professor. Does anyone who can check for it ?????????????!!!! Thank you :) involving the inverses of matrices A and B. Use the matrices shown below instead of those given in your text. A=1 -3 B= 1 -2 2 -5 2 -3 (1)Find A^-1 (2)Find B^-1 my first answer was -5 3 -2 1 and second one was -3 2 -2 1
Mathematics
chestercat
  • chestercat
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LynFran
  • LynFran
|dw:1437273670566:dw|im getting the same thing... http://www.mathwords.com/i/inverse_of_a_matrix.htm for more info..
anonymous
  • anonymous
A simple way to check if you got the right answer is to multiply the inverse of your matrix (or rather the end result of what you just computed) with the matrix itself. The result should be the identity matrix. Let's give it a shot: -5 3 * 1 -3 = -5 +6 15-15 = 1 0 -2 1 2 -5 -2+2 6-5 0 1
anonymous
  • anonymous
So your first answer is correct.

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