With the numbers 2, 4, 6, 8, all the
possible determinants with these four
different elements are constructed.
What is the sum of the values of all
such determinants?
Answers
Given : numbers 2, 4, 6, 8
To Find : all the possible determinants with these four different elements are constructed.
sum of the values of all such determinants
Solution:
4 elements can be arranged in 4 ! ways = 24 way
2 * 4 - 6 * 8 = - 40 ( 4 times ) as these can be
( 4 * 2 - 6 * 8 or 2 * 4 - 8 * 6 = 4 * 2 - 8 * 6 )
Similarly
2 * 6 - 4 * 8 = - 20 ( 4 times )
2 * 8 - 4 * 6 = - 8 ( 4 times)
4 * 6 - 2 * 8 = 8 ( 4 times)
4 * 8 - 2 * 6 = 20 ( 4 times)
6 * 8 - 2 * 4 = 40 ( 4 times)
Sum of values of all such determinants = 0
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