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Question: question 6 a let x be an n p...

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Question 6 (a) Let X be an n × p matrix, and set S = X. Suppose the spectral decomposition of S is s-Σ, λί ử, r. Show that the p columns of X[m , . . . , ur.] are pairwise orthogonal. (b) Let -3-2 2 -3 Find a 2 x 2 orthogonal matrix P, such that the two column vectors of XP are perpendicular to each other

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