Page 6 - Focus SPM KSSM 2021 Tingkatan 5 - Maths DLP

Mathematics Form 5 Chapter 2 Matrices

(b) The number of male and female participants of a
2.1 Matrices Mathematics Quiz are 16 and 12 respectively.
(c) The table below shows the number of accidents
A Representing information from real in three cities, X, Y and Z.
situations in the form of matrices Accidents
City
1. Matrix is a set of numbers arranged in rows and Car Motorcycle
columns to form a rectangular or a square array. X 10 26
For example,
Y 11 8 Chapter 2
columns 15 14
Z
Chapter 2
1 2 9
rows 3 4 7 8 4 Solution
4
4 3
Minion Pro 10pt = 1 60 40 15 60 48 55
2 2. Matrix is usually represented by capital letter (a) 3 48 38 15 or 40 38 23
and enclosed by bracket [ ] or ( ). 55 23 10 15 15 10
Arial 8.5 pt = 1 16
2 3. Row matrix is a matrix that has only one row. (b) [16 12] or 3 4
For example, A = [5 –2 11] 12

Kaedah Alternatif 4. Column matrix is a matrix that has only one (c) 3 10 26 4 3 10 11 15 4
11
8 or
column. 15 14 26 8 14
3
For example, B = 3 4 Try Question 1 in Try This! 2.1
35
5. Square matrix is a matrix that has the same
number of rows and columns. B Determining the order of a matrix,
hence identifying certain elements in
For example, C = 3 1 0 4 a matrix
9 8
1. The order of a matrix is determined by the
6. Rectangular matrix is a matrix that has different number of rows and columns of the matrix.
number of rows and columns.

For example, D = 3 16 8 –5 4 2. Matrix with m rows and n columns has an
order of m × n and is read as “matrix m by n”.
–3 9 21
For example, matrix A = 3 1 2 9 4 has 2 rows
4 7 8
1 and 3 columns. Therefore, the order of matrix A
Represent the following information in the form of is 2 × 3.
matrices. 3. Each number in a matrix is called an element
th
(a) The table below shows the sales of stationery in a of the matrix. The element located at the i row
school bookshop for March to May. and j column of matrix A can be represented
th
as a ij .
Exercise Drawing
Pen For example, for matrix
book paper 1 2 9
March 60 40 15 A = 3 4 7 8 4 ,
April 48 38 15 the element at the first row and 3 column, that
rd
is a 13 = 9.
May 55 23 10
4. a 13 is read as “a one three”.

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02 Focus Math F5_E2021.indd 18 18/02/2021 2:32 PM