Exercise 2.3.2

Answers

1.

A (2 B + 3 C) = (\begin{matrix} 20 & - 9 & 18 \\ 5 & 10 & 8 \end{matrix}) .

(AB) D = A (BD) = (\begin{matrix} 29 \\ - 26 \end{matrix}) .

2.

A^{t} = (\begin{matrix} 2 & - 3 & 4 \\ 5 & 1 & 2 \end{matrix}) .

A^{t} B = (\begin{matrix} 23 & 19 & 0 \\ 26 & - 1 & 10 \end{matrix}) .

B C^{t} = (\begin{matrix} 12 \\ 16 \\ 29 \end{matrix}) .

CB = (\begin{matrix} 27 & 7 & 9 \end{matrix}) .

CA = (\begin{matrix} 20 & 26 \end{matrix}) .

jephianlin

2011-06-27 00:00