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pls help 7. (2 points) Extra credits. Let A be an m =% n matrix wtih rank n. (a) Find the matrix M which is

pls help

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7. (2 points) Extra credits. Let A be an m =% n matrix wtih rank n. (a) Find the matrix M which is the left inverse of A, that is MA = I. (b) Show that AM is the projection matrix of R onto the column space C of A, that means proj-x = AMx for all x R

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