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Is it necessary that the lower triangular matrix should contain 1 as leading diagonal in LU decomposition? In the solution to this problem they have taken the triangular matrix diagonal as 1.

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https://gateoverflow.in/380396/go-classes-test-series-2024-linear-algebra-test-question-16
please explain me this question @Sachin Mittal 1. I am unable to understand this question can anyone
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