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If the trivial solution is the only solution of the system of equations `x-ky + z = 0, kx + 3y-kz=0, 3x + y-z = 0` Then the set of all values of `k` is:

A

`R-(2-3)`

B

`R-(2)`

C

`R-(-3)`

D

`(2,-3)`

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The correct Answer is:
A
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