Find an example of a 2 x 2 matrix A such that A? + I2, A3 + I2, and A6 = I2. Explain how you know, without calculating, that A4 must be invertible.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Find an example of a 2*2 matrix such that A2 is not equal to the Identity matrix I2, A3 is not equal to I2. Explain how you konw without calculating, that A4    must be invertible.
Find an example of a 2 x 2 matrix A such that A? + I2, A3 + I2, and A6 = I2. Explain how
you know, without calculating, that At must be invertible.
Transcribed Image Text:Find an example of a 2 x 2 matrix A such that A? + I2, A3 + I2, and A6 = I2. Explain how you know, without calculating, that At must be invertible.
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