DeterminantHard

Question

If = (x - y) (y - z) (z - x) , then:

Options

A.k = - 3
B.k = - 1
C.k = 1
D.k = 3

Solution

= xkykzk
= (x - y) (y - z) (z - x) (xy + zy + zx) xkykzk     at  k = - 1
= (x - y) (y - z) (z - x)

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