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All the diagonal elements of a skew-symmetric matrix is?

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All the diagonal elements of a skew-symmetric matrix is?

(a) 0

(b) 1

(c) 2

(d) Any integer

I had been asked this question in an online interview.

Asked question is from Operations on Matrices topic in portion Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

1 Answer

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Correct answer is (a) 0

Best explanation: Since for a skew symmetric matrix aij = -aij, this implies all diagonal elements should be zero.

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