A) \[a\ne 1\]
B) \[a=1\]
C) \[a=0\]
D) \[a=-1\]
Correct Answer: B
Solution :
Put \[a=1\]; \[\therefore \] \[|A|=\left| \,\begin{matrix} 1 & 2 \\ 2 & 4 \\ \end{matrix}\, \right|=4-4=0\] Hence, A is a singular matrix for a = 1.You need to login to perform this action.
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