Answer: In Exercises 5 and 6, let Note that S is an
Chapter 8, Problem 6E(choose chapter or problem)
Problem 6EIn Exercises 5 and 6, let
Note that S is an orthogonal basis for R3. Write each of the given points as an affine combination of the points in the set S, if possible. [Hint: Use Theorem 5 in Section 6.2 instead of row reduction to find the weights.]
Reference Theorem 5 in Section 6.2:
An m × n matrix U has orthonormal columns if and only if UTU = I .
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