# QR factorization

Let A= (1 0 -1 and b=(1

1 2 1 1

1 1 -3 1

0 1 1) 1)

1) Determine the QR factorization of A

2) Use the QR factors in 1) to determine the lease squares solution to Ax=b. Ax=b is the solution related to Rx=Q^Tb

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#### Solution Summary

QR factorization is clearly articulated.

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