Matrix

             Matrix

In class 12th matrix plays an important role in board exams.Learn deeply with simple method and gain full marks in maths. 

Matrix Definition- A matrix is an array of real numbers (or other suitable entities), arranged in rows and columns.

Types of matrices

1. Rectangular matrix- Any m×n matrix, where m≠n, is called a rectangular matrix.
2. Row matrix - A matrix having only one row is called a row matrix.
3. Column matrix- A matrix which has only one column is called a column matrix.
4. Square matrix- A matrix in which the number of rows is equal to the number of columns is called a square matrix.
5. Diagonal matrix- It is a square matrix all of whose elements except those in the leading diagonal, are zero.
6. Scalar matrix - A square matrix in which the diagonal elements are all equal, all other elements being zeros, is called a scalar matrix.
7. Unit matrix or Identity matrix- A square matrix in which each diagonal element is unity, all other elements being zeros, is called a unit matrix or an identity matrix.
8. Sub-matrix :- A matrix obtained by deleting the rows or columns or both of a matrix is called sub-matrix.
9. Comparable matrices - Two matrices A and B are said to be comparable if they are of the same order, they have the same number of rows and the same number of columns. 

For detailed concept of matrix see the video...

https://youtu.be/El4LQSJUYfA

matrix detailed concept