रैखिक समीकरणों के निकाय x + y + z = 2, 2x + y - z = 3, 3x + 2y + kz = 4 का एक अद्वितीय हल है यदि

1
k ≠ 0
2
-1 < k < 1
3
-2 < k < 2
4
k = 0

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