Did I Make a Mistake in my Matrix Multiplication?

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Homework Help Overview

The discussion revolves around matrix multiplication, specifically addressing concerns about the accuracy of answers provided during a timed exam. Participants are examining the results of their calculations and the implications of using an identity matrix.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants are checking their answers and questioning the correctness of specific elements in their results. There is a focus on the identity matrix and its role in the multiplication process.

Discussion Status

Some participants have pointed out potential errors in the answers, particularly regarding specific entries in the matrix. There is an ongoing exploration of the implications of using an identity matrix, with no consensus reached yet.

Contextual Notes

There is mention of the constraints of a timed exam, which may affect the participants' ability to verify their answers thoroughly.

r-soy
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Hi all

I want check my answers​
 

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r-soy said:
Hi all

I want check my answers​

It says it was a timed exam?
 
The upper right number in the answer of the first question is wrong. The rest is Ok.

The second matrix multiplication was with an unity matrix. You didn't have to write that one out.
 
willem2 said:
The upper right number in the answer of the first question is wrong. The rest is Ok.

The second matrix multiplication was with an unity matrix. You didn't have to write that one out.
Usually called identity matrix.
 

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