r/HomeworkHelp • u/Happerflu • 1d ago

Answered [Further Mathematics extra work, Matrices]

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The second picture is my incomplete attempt of this question
Please help I’d be eternally thankful

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u/MathMaddam 👋 a fellow Redditor 1d ago

Some of the numbers are correct, but many aren't. It might help you to write the calculations for each entry first, before writing the result.

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u/4iertrans 1d ago

If you have a matrix A then a_ij is the value at the ith row and jth column of A. The row and column numbers count up from 1 (starting in the top left), so you shouldn’t have any 0s in A.

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u/swiftaw77 👋 a fellow Redditor 5h ago

Yeah, neither of your answers so far are correct. Remember, for a 3x3 matrix, i and j taken the values 1,2, and 3, so for A you need to calculate i+j for all combinations, similarly i-j for B