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1. For each of the following matrices, find its trace and determine whether it is symmetric. 1 4 y x3 1 A1 0 -1

1. For each of the following matrices, find its trace and determine whether it is symmetric. 1 4 y x3 1 A1 0 -1 , A2 , A3 4 -3 -1 x3 -1 0 7 1

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