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If the equations x + 3y + z = 0, 2x - y - z = 0, kx + 2y + 3z = 0 have non-trivial solution then k = ...

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If the equations x + 3y + z = 0, 2x - y - z = 0, kx + 2y + 3z = 0 have non-trivial solution then k = ...

(a) 13/2

(b) 9/2

(c) - 15/2

(d) - 13/2

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The correct option (c) - 15/2

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