Part I 0 3 4 Let A 2 1 6 . If we try to do a decomposition PA = LU, 0 1 5 we should start by multiplying the matrix by P = How many 5x5 permutation matrices are there? 2 What value of c will make the matrix symmetric? 2 1 Part II 2 is a vector in R", where n = The vector Any subspace of R° must pass through the point 1 2 Let M 3 4 The column space C(M) is a subspace of R", 5 6 where n =

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