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[" 60.If "A" be 'a real skew-symmetric m...

[" 60.If "A" be 'a real skew-symmetric matrix of order "],[" n such that "A^(2)+I=0," I being the identity "],[" matrix of the same order as that of "A" ,then "],[" what is the order of "A" ? "],[" (a) "3" ."],[" (b) Odd "],[" (c) Prime number "],[" (d) Even "]

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