Exercise 2.5.2

For these problem, just calculate ${[I]}_{{\beta }^{\prime }}^{\beta }$.

1.

$\left(\begin{array}{cc}\hfill a_1\hfill & \hfill b_1\hfill \\ \hfill a_2\hfill & \hfill b_2\hfill \end{array}\right).$

2.

$\left(\begin{array}{cc}\hfill 4\hfill & \hfill 1\hfill \\ \hfill 2\hfill & \hfill 3\hfill \end{array}\right).$

3.

$\left(\begin{array}{cc}\hfill 3\hfill & \hfill -1\hfill \\ \hfill 5\hfill & \hfill -2\hfill \end{array}\right).$

4.

$\left(\begin{array}{cc}\hfill 2\hfill & \hfill -1\hfill \\ \hfill 5\hfill & \hfill -4\hfill \end{array}\right).$