Question: 7 Linear algebra Final answer only( no explanation needed ) Problem 7. (8 points) 6 1 14 Let A = 3 2 and b =

7 Linear algebra Final answer only( no explanation needed )

Problem 7. (8 points) 6 1 14 Let A = 3 2 and b = 28 The QR factorization of the matrix A is given by: 2 -14 6 7V/2 8 2 71/2 15 05 0 2 3 7V2 (a) Applying the QR factorization to solving the least squares problem Ax = b gives the system: (use exact values) 2 X (b) Use backsubstitution to solve the system in part (a) and find the least squares solution. * = Note: You can earn partial credit on this

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