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[@Ex.2" If "P" is an orthognal matrix an...

[@Ex.2" If "P" is an orthognal matrix and "Q=PAP^(T)" and "],[B=P^(T)Q^(1000)P," then "B^(-1)" is,where "A" is involutory matrix "],[[" (a) "A," (b) "A^(" ood ")," (c) "I," (d) None of these "]]

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