Let S be the set of all $\lambda\in R$ for which the system of linear equations
2x – y + 2z = 2
x – 2y + λz = –4
x + λy + z = 4
has no solution. then the set S
(1) is a singleton
(2) contains exactly two elements
(3) contains more than two elements
(4) is an empty set
2x – y + 2z = 2
x – 2y + λz = –4
x + λy + z = 4
has no solution. then the set S
(1) is a singleton
(2) contains exactly two elements
(3) contains more than two elements
(4) is an empty set