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Question

Find inverse, by elementary row operations (if possible), of the following matrix:

 [1326]


Solution

Let A=[1326]

In order to use elementary row operations, we write A = IA

[1326]=[1001]A

[1300]=[1021]A     [R2R2+2R1]

Since, we obtain all zeroes in a row of the matrix A on LHS, A1 does not exist.

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