The existence of the unique solution of the system \( x+y+z=\lambda...

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The existence of the unique solution of the system \( x+y+z=\lambda, 5 x-y+\mu z=10,2 x+3 y-z=6 \)
P depends on

W
(1) \( \mu \) only
(2) \( \lambda \) only
(3) \( \lambda \) and \( \mu \) both
(4) neither \( \lambda \) nor \( \mu \)
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