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In this proof where does the exponent 3 come from?

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- Mar 15th 2013, 06:03 AMkingsolomonsgravelinear algebra proof
Attachment 27536

In this proof where does the exponent 3 come from? - Mar 15th 2013, 06:20 PMchiroRe: linear algebra proof
Hey kingsolomonsgrave.

Look at this page: Determinant -- from Wolfram MathWorld for the identity:

det(aX) = a^n * det(X) when X is a nxn matrix,