Find the least square solution of Ax = c where and compute the associated least square error. [10+0]
Find the least square solution of $Ax = c$ where
$$A = \begin{bmatrix} 1 & -3 & 3 \ 1 & 5 & 1 \ 1 & 7 & 2 \end{bmatrix}, \quad c = \begin{bmatrix} 5 \ -3 \ 5 \end{bmatrix}$$
and compute the associated least square error. [10+0]
$$A = \begin{bmatrix} 1 & -3 & 3 \ 1 & 5 & 1 \ 1 & 7 & 2 \end{bmatrix}, \quad c = \begin{bmatrix} 5 \ -3 \ 5 \end{bmatrix}$$ We solve the normal equations $A^TA\hat{x} = A^Tc$. --- $$A^T = \begin{bmatrix} 1 & 1 & 1 \ -3 & 5 & 7 \ 3 & 1 & 2 \end{bmatrix}$$ $$A^TA = \begin{bmatrix} 3 & 9 & 6 ...