Chapter 2.4, Problem 49E

To determine

a.

To write:

The two $3\times 4$ matrices, $A$ and $B$.

To determine

b.

The values of $a_{12}$ and $b_{12}$.

To determine

c.

The values of $a_{33}$ and $b_{33}$.

To determine

d.

The value of $\frac{1}{4}\left(a_{11}+a_{12}+a_{13}+a_{14}\right)$.

To determine

e.

The value of $\frac{1}{2}\left(a_{34}+b_{34}\right)$.