A matrix is factored as by ordinary Gaussian elimination with no row swaps, using the convention from the lesson: is lower triangular with s on its diagonal and the elimination multipliers below it, and is what elimination leaves behind.
Write for the entry in row , column of , and for the entry in row , column of .
Which pair of values is correct?
Once you get it right, the reasoning behind the answer shows up here.
Select all that apply.