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Question

If A=[13 24] find A1by elementary transformation.?

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Solution

A=[1234]
We know that A=AI
[1234]=A[1001]
C2C22
[1132]=A10012
C2C2C1
[1031]=A11012
C2C2×(1)
[1031]=A11012
C1C13C2
[1001]=A213212
A1=213212

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