A) - 1, 2
B) 1, 2
C) 0, 1
D) - 1, 1
Correct Answer: D
Solution :
For non-trivial solution \[\Delta =0\] Þ \[\left| \,\begin{matrix} 1 & -k & -1 \\ k & -1 & -1 \\ 1 & 1 & -1 \\ \end{matrix}\, \right|\,=\,0\] Þ \[k=1,\,-1.\]
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