Question: 4. (15 points) Show that the matrix 3 0 21 0 4 1 is nonsingular. Find its QR factorization. -1 0 1

4. (15 points) Show that the matrix 3 0 21 0 4

4. (15 points) Show that the matrix 3 0 21 0 4 1 is nonsingular. Find its QR factorization. -1 0 1

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