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# Let A be a symmetric n n matrix with eigenvalues 1, . . . , n and orthonormal

ISBN: 9780136009290 436

## Solution for problem 28 Chapter 7.4

Linear Algebra with Applications | 8th Edition

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Linear Algebra with Applications | 8th Edition

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28
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Problem 28

Let A be a symmetric n n matrix with eigenvalues 1, . . . , n and orthonormal eigenvectors u1, . . . , un. Let x Rn and let ci = uT i x for i = 1, 2, . . . , n. Show that (a) _Ax_22 = _n i=1 (i ci )2 (b) If x _= 0, then min 1in |i| _Ax_2 _x_2 max 1in |i (c) _A_2 = max 1in |i | 2

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##### ISBN: 9780136009290

This full solution covers the following key subjects: . This expansive textbook survival guide covers 47 chapters, and 921 solutions. This textbook survival guide was created for the textbook: Linear Algebra with Applications, edition: 8. Since the solution to 28 from 7.4 chapter was answered, more than 211 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 28 from chapter: 7.4 was answered by , our top Math solution expert on 03/15/18, 05:24PM. The answer to “Let A be a symmetric n n matrix with eigenvalues 1, . . . , n and orthonormal eigenvectors u1, . . . , un. Let x Rn and let ci = uT i x for i = 1, 2, . . . , n. Show that (a) _Ax_22 = _n i=1 (i ci )2 (b) If x _= 0, then min 1in |i| _Ax_2 _x_2 max 1in |i (c) _A_2 = max 1in |i | 2” is broken down into a number of easy to follow steps, and 77 words. Linear Algebra with Applications was written by and is associated to the ISBN: 9780136009290.

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