Let U be an m-dimensional subspace of Rn and let V be a k-dimensional subspace of U,
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(a) Show that any orthonormal basis (v1, v2,...,vk} for V can be expanded to form an orthonormal basis {v1, v2,..., vk, vk+1,..., vm} for U.
(b) Show that if W = Span(v1 +.....+ vk+2 ..., vm), then U = V ⊕ W.
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a If v 1 v k is an orthonormal basis for V then by Theorem 344 it can be exte...View the full answer
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