SOLUTION: |a b c d 1|
|b c d a 1|
|c d a b 1| =0
|d a b c 1|
|b a d c 1|
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Question 1044576: |a b c d 1|
|b c d a 1|
|c d a b 1| =0
|d a b c 1|
|b a d c 1|
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
.
Perform the following elementary column operations (ECO3) IN SUCCESSION (which don't change the value of the determinant):
,
,
.
What you get is the determinant
.
=,
since columns 4 and 5 have identical entries. (Note that a+b+c+d was factored ONCE only from the fourth column.)
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