Which of the following matrices are singular? a) 2 -1 b) 3 A= 0 -1 4 B= 6 3 2 d) D= 24 10 3 -1 2 -1 1 1 0-2 3 31 14 -1 0 2 -1 4 260 2 0 0 0 3 0 00 -1 c) C= 1 3 -1 0-2 3 1 14 0 2 -1

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