Linear Algebra Quiz
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INNER PRODUCT SPACES & ORTHOGONALITY
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Let x^\hat{\mathbf{x}} be the least-squares solution to Ax=bA\mathbf{x} = \mathbf{b}, and let W=Col(A)W = \mathrm{Col}(A). Which of the following vectors must lie in the orthogonal complement of WW, denoted W⊥W^\perp?
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