Let A,B, and C be 2 x 2 matrices with det A=3, det B=-2, and det C=-2012
Last edited by dumbledore; Nov 12th 2012 at 05:09 PM.
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Do you not know that det(AB)= det(A)det(B)? From that it follows that and, in particular . Also, it is easy to see that .
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