Consider the following 2 x 2 matrix -5 A = 3. For any matrix, we have a clear understanding of some exponents: A" refers to multiplying a matrix to itself n times and A-l refers to the inverse matrix. Combining this idea gives A- = (A-')", the nth power of the inverse. A natural question to ask is, can we take the nth root of a matrix? We're going to try to find A/3, i.e. a matrix that when we cube it gives A. (a) Calculate the eigenvalues and eigenvectors of A. (b) Find a matrix P and a diagonal matrix D such that A = PDP-1. (c) Find a matrix E such that E = D. Explain why this result is simple compared to finding the cube root of A.
Consider the following 2 x 2 matrix -5 A = 3. For any matrix, we have a clear understanding of some exponents: A" refers to multiplying a matrix to itself n times and A-l refers to the inverse matrix. Combining this idea gives A- = (A-')", the nth power of the inverse. A natural question to ask is, can we take the nth root of a matrix? We're going to try to find A/3, i.e. a matrix that when we cube it gives A. (a) Calculate the eigenvalues and eigenvectors of A. (b) Find a matrix P and a diagonal matrix D such that A = PDP-1. (c) Find a matrix E such that E = D. Explain why this result is simple compared to finding the cube root of A.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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