The system of linear equations
x + y + z = 4
x + 2y + 3z = 7
x + 4y + λz = μ
has a unique solution if-
1
\(\lambda=7,\mu=13\)
2
\(\lambda\ne7\)
3
\(\mu\ne13\)
4
\(\lambda=7,\mu\ne13\)
The system of linear equations
x + y + z = 4
x + 2y + 3z = 7
x + 4y + λz = μ
has a unique solution if-