Last updated at July 31, 2018 by Teachoo

Transcript

Ex3.1 , 1 In the matrix A = [■8(2&5&19&−7@35&−2&5/2&12@√3&1&−5&17)], write: The order of the matrix Since the matrix has 3 rows and 4 columns Order of matrix A = 3 × 4 Ex3.1 , 1 In the matrix A = [■8(2&5&19&−7@35&−2&5/2&12@√3&1&−5&17)], write: (ii) The numbers of elements We can count that number of elements is 12 Alternatively, The order of matrix is 3 × 4 So, number of elements = 3 × 4 = 12 Ex3.1 , 1 In the matrix A = [■8(2&5&19&−7@35&−2&5/2&12@√3&1&−5&17)], write: (iii) Write the elements a13, a21, a33, a24, a23 a13 is first row, third column ∴ a13 = 19 a21 is second row, first column ∴ a21 = 35 a33 is third row, third column ∴ a33 = −5

Chapter 3 Class 12 Matrices

Concept wise

- Formation and order of matrix
- Types of matrices
- Equal matrices
- Addition/ subtraction of matrices
- Statement questions - Addition/Subtraction of matrices
- Multiplication of matrices
- Statement questions - Multiplication of matrices
- Solving Equation
- Finding unknown - Element
- Finding unknown - Matrice
- Transpose of a matrix
- Symmetric and skew symmetric matrices
- Proof using property of transpose
- Inverse of matrix using elementary transformation
- Proof using mathematical induction

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.