In Exercises 3942, find (a) A, (b) B, (c) AB, and (d) AB. What do you notice about AB?
Chapter 8, Problem 39(choose chapter or problem)
The Determinant of a Matrix Product In Exercises 39-42, find (a) |A|, (b) |B|, (c) AB, and (d) |AB|. What do you notice about |AB|?
\(A=\left[\begin{array}{rr}-2&1\\ 4&-2\end{array}\right],\quad\ B=\left[\begin{array}{rr}1&2\\ 0&-1\end{array}\right]\)
Text Transcription:
A = [_4 -2 ^-2 1], B = [_0 -1 ^1 2]
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