For which value(s) of kkk is the system (1kk4)(xy)=(12)\begin{pmatrix} 1 & k \\ k & 4 \end{pmatrix} \begin{pmatrix} x \\ y \end{pmatrix} = \begin{pmatrix} 1 \\ 2 \end{pmatrix}(1kk4)(xy)=(12) inconsistent or dependent?
k=2k = 2k=2 or k=−2k = -2k=−2
k=4k = 4k=4
k=0k = 0k=0
k=1k = 1k=1