For what value of kkk is det(2k36)=0\det\begin{pmatrix} 2 & k \\ 3 & 6 \end{pmatrix} = 0det(23k6)=0?
k=1k = 1k=1
k=3k = 3k=3
k=4k = 4k=4
k=6k = 6k=6