Lipschutz Ex. 4.77
Hint: Note that $\left[\begin{smallmatrix}1&0\\x&3\end{smallmatrix}\right]^3=\left[\begin{smallmatrix}1&0\\13x&27\end{smallmatrix}\right]$.
Lipschutz Ex. 4.77
Hint: Note that $\left[\begin{smallmatrix}1&0\\x&3\end{smallmatrix}\right]^3=\left[\begin{smallmatrix}1&0\\13x&27\end{smallmatrix}\right]$.