A) 3
B) - 3
C) 2
D) - 2
Correct Answer: D
Solution :
The coefficient determinant \[D=\left| \,\begin{matrix} 2 & -1 & -1 \\ 1 & -2 & 1 \\ 1 & 1 & \lambda \\ \end{matrix}\, \right|\] = \[3\lambda -6\] For no solution, the necessary condition is \[D=0\] i.e., \[-3\lambda -6=0\Rightarrow \lambda =-2\] It can be seen that for \[\lambda =-2,\] there is no solution for the given system or equations.You need to login to perform this action.
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