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## Homework Statement

Please see the attached file if my inline insertion does not work.

## Homework Equations

##det(A)=det(A^T)##[/B]

## The Attempt at a Solution

Since a matrix has a determinant of zero only when it's columns are linearly dependent, we look for a set of points [x1 x2] such that the first column of the matrix is linearly dependent. This is about as far as I got and I was wondering if this is the right approach or if there's a much more simpler way to approach this problem.[/B]