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  3. a, b, c, d are all matricies a = 2x3 1 2 ?3 ?1 4 5

A, B, C, D are all matricies A = 2x3 1 2 ?3 ?1 4 5 , B = 2x3 3...

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Basic Math

A, B, C, D are all matricies
A = 2x3
1 2 ?3
?1 4 5
,
B = 2x3
3 0 ?1
1 2 1

, C = 2x2
2 5
1 2

,
D = 3x3
1 ?1 1
2 ?1 2
4 ?3 4

Find each of the following or explain why it does not exist.
1) A + B,
2) 2A ? 3B,
3) A + C,
4) A ? C,
5) AC,
6) CA,
7) AD,
8) DA,
9) C
10) D?1
.
11) Solve the matrix equation CX = B

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