Exercise 2

Which of these are matrix equivalent to each other?

• (a)  $\begin{pmatrix}1&2&3\\ 4&5&6\\ 7&8&9\end{pmatrix}$     (b)  $\begin{pmatrix}1&3\\ -1&-3\end{pmatrix}$     (c)  $\begin{pmatrix}-5&1&0\\ -1&0&1\end{pmatrix}$     (d)  $\begin{pmatrix}0&-1\\ 0&5\end{pmatrix}$     (e)  $\begin{pmatrix}1&0&1\\ 2&0&2\\ 1&3&1\end{pmatrix}$     (f)  $\begin{pmatrix}3&1&0\\ 9&3&0\\ -3&-1&0\end{pmatrix}$