Study Mathematics notes on Matrices for O-Level. Useful for revision, homework, and exam preparation in Zimbabwe.
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This is the O-Level Mathematics notes. It is a free notes for revision.
A matrix (plural - matrices) is a smart way of storing information,
especially that involving numbers. Consider the table below.
\begin{table}
\captionsetup{labelformat=empty}
\caption{SOCCER LEAGUE LOG}
Team | Won | Draw | Lost
A | 3 | 1 | 1
B | 1 | 2 | 2
C | 0 | 2 | 3
\end{table}
The numbers show a team performance and can be written in matrix form as
Features of a matrix are:
1. the members (elements) are written in rows and columns.
2. the members (elements) are always enclosed in brackets.
By the end of this chapter, students should be able to:
$\sqrt{1}$ use and interpret a matrix as a store of information.
2 use the idea of order of a matrix in operations.
3 multiply matrices with a scalar and/or with another matrix where possible.
4 find the determinant of any $2 \times 2$ matrix.
5 find and/or use the inverse of a $2 \times 2$ non-singular matrix.
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