Which of the following is/are true about the least square method? Interchanging rows never changes the solution of the least square method. We should apply the least squares method to the system Ax=b,...

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Extracted text: Which of the following is/are true about the least square method? Interchanging rows never changes the solution of the least square method. We should apply the least squares method to the system Ax=b, where b lies in the column space of A. We should apply the least squares method to the system Ax=b, where b does not lie in the column space of А. The least squares solution makes the error as small as possible.


Extracted text: Which of the following is/are true? An orthogonal basis is always an orthonormal basis. Every orthonormal basis is the standard basis. Every vector in a space is orthogonal to the zero vector of that space. Every vector of an orthonormal basis is a unit vector.