Question: In the answer to question 2 letter C, where did this matrix came from: 2 4 0 0 2 1 3 0 2 1 2

In the answer to question 2 letter C, where did this matrix came from:

2 4 0

0 2 1

3 0 2

In the answer to question 2 letter C, where did this matrix

1 2 = 4, JM121= 0 1 3 2 = -3, IM13/ 0 2 30 -6. IM2= 4 = 8, Mm = 2 0 = 4, M23|= 2 4 0 2 3 2 3 0 = -12, (4) IM31= 4 0 2 0 2 4 2 = 4, M32|= 1 = 2, IM33|= 0 2 = 4 Substituting (4) into (3) we obtain 3 -C C = 4 12 -2 (b) (5) 4 3 -8 12 (6) From Question 1 141= 20. (7 ) Substituting (6) and (7) into (5) we obtain Add = (8) (c) To prove that D = = 4-1 we need to show that AD = DA = 13 That is

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