Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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a). Explain what changes in your formula when L is a general invertible lower- triangular matrix and how it reveals that the inverse of a lower-triangular matrix is lower-triangular

 b). give a concise proof that the inverse of an upper triangular matrix is upper triangular

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