Question: cry when D = p. 2. If X has full rank, prove that EL, (Y - Y) = 0. Hint: Consider the first column of

cry when D = p. 2. If X has full rank,

prove that EL, (Y - Y) = 0. Hint: Consider the first

cry when D = p. 2. If X has full rank, prove that EL, (Y - Y) = 0. Hint: Consider the first column of X

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