







4 by 4 determinants 
20080627 

From rav: How to solve problems of determinants which has four rows and four columns& please give me easy tips to solve permutations and combinations problems. Answered by Harley Weston. 





Expanding determinants using minors 
20010220 

From A student: Question: 1) Determinants by expansion by minors. i)  1 2 1 2 1   1 0 0 1 0   0 1 1 0 1   1 1 2 2 1   0 1 1 0 2  Answered by Harley Weston. 





order 4+ determinants 
19991206 

From Joe Kron: Why is it never shown how to calculate the value of 4x4 (or larger size) deteminants by the diagonal multiply methods that are generally shown for 2x2 and 3x3 determinants? The method I'm talking about is called Cramer's Rule??? Is this method not extensible to order 4+ and if not why not? Anyway the method always shown for order 4+ is called "reduction by minors" which is not the answer to this question. Answered by Walter Whiteley. 

