Let A be a 3 x 3 symmetric matrix given by A = 2 -1 0 -1 0 2 -1 2 -1 Find an upper triangular matrix R with positive diagonal entries such that A justify why such R doesn't exist. = RTR o or

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A: Explanation is given below..

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A: Consider the provided question, Let U be an n x n non-singular matrix with non-zero diagonal…

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A: Given,                  A=123231312

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Q: Suppose A +A+I-0 where A is a square matrix then A= A -A-I -2A A-I CS Scanned with CamScanner

A: Now we will find A-1 . Where I is identity matrix.

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