These are solved class 9 math Ex 1.4 notes applicable for Class 9/ 9th/ SSC-1/ Matric Part-I/ 9th Grade/ SSC Part-I/ High School/ O-Level/ General Science Group/ Humanities Group. Pdf of solved math chapter 1 (Matrices and Determinants) are provided. The Pdf’s contains notes of exercise 1.4.
Class 9 Math Ex 1.4 Notes
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Chapter 1 Exercise 1.4 Solution Notes PDF
This is the Pdf notes of Solved class 9 math exercise 1.4 . It is same for Class 9/ 9th/ SSC-1/ Matric Part-I/ 9th Grade/ SSC Part-I/ High School/ O-Level/ General Science Group/ Humanities Group Math book. The Notes are valid and are included in the syllabus and curriculum of FBISE(Federal Board of Intermediate &Secondary Education), Punjab Boards.
In class 9 math ex 1.4 notes of Matrices and determinants the process of Matrix Multiplication is briefly described for the multiplication of the matrices.
Multiplication of Matrices
Two matrices A and Bare conformable for multiplication, giving product AB if
the number of columns of A is equal to the number of rows of B. So A and B matrices are conformable for multiplication.
Associative Law under Multiplication
If A, B and C are three matrices conformable for multiplication then associative
law under multiplication is given as.
(AB)C = A(BC)
Commutative Law of Multiplication of Matrices
Commutative law under multiplication in matrices does not hold in general i.e.,
if A and B are two matrices, then AB ≠ BA.
Multiplicative Identity of a Matrix
Let A be a matrix. Another matrix B is called the identity matrix of A under multiplication if
AB=A=BA
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