Tuesday, March 5, 2013

Introduction Matrices Math

Introduction to matrices math:

Let us see introduction of matrices math. Matrices are the plural expression of matrix. An item in matrix is specified as specified as element. In matrix the numbers are represented by either row or column. Matrices are one of the key apparatus in math linear algebra. It is also used to represents the linear transformations.

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Definition of matrices:


The matrix is a rectangular array of numbers. It is a prearranged set of numbers. The math matrices are represented within square braces.  This is the introduction of basis matrices.

Let consider the matrix,

A=`[[2,3],[6,8]]`

The matrix A contains 2 rows and 2 columns. So it is simply called as 2 x 2 matrixes. If it contains 3 rows and 3 columns it is called as 3 x 3 matrices. There are many types of matrices in math.

Types of matrices:

There are 11 types of matrices in the introduction of math.

Type 1: Square matrices.

Type 2: oblique matrices.

Type 3: Row matrices.

Type 4: Column matrices.

Type 5: Matrices of same kind.

Type 6: Transpose of matrices.

Type 7: Zero matrices.

Type 8: Identity matrices.

Type 9: Scalar matrices.

Type 10: symmetric matrices.

Type 11: Skew-symmetric matrices.

Operations in matrices:

There are four operations in matrices. The introduction of operations is following below:

Operation 1: Addition of matrices.

Operation 2: Subtraction of matrices.

Operation 3: Multiplication of matrices.

Operation 4: Division of matrices.

Properties of matrices:

There are five properties in matrices. The introduction of properties is following below.

Property 1: Transpose of matrices.

Property 2: Inverse of matrices.

Property 3: Commutative of matrices.

Property 4: Associative of matrices.

Property 5: Distributive of matrices.

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Matrices example problem:


Let us see some introduction examples of matrices.

Problem 1:

Multiply two matrices, where the matrices are

A= `[[3,7],[5,2]]`     B = `[[6,2],[3,8]]` .

Solution:

The matrix multiplication is following below:

N = `[[3,7],[5,2]]`  * `[[6,2],[3,8]]` .

=`[[18+21,6+56],[30+6,10+16]]`

= `[[39,62],[36,26]]` .

This is the solution for the given matrices.

Problem 2:

Find the inverse matrices of given matrix.

A= `[[7,9],[3,5]]`

`Solution:`

Inverse matrices is the process of alternating the rows as columns and columns as rows.

So, A = `[[7,3],[9,5]]` .

This is the inverse matrices of given problem.

Problem 3:

Add the matrices with unit matrices. The matrix is A=`[[3,5],[7,8]]`

Solution:

The unit matrix is = `[[1,0],[0,1]]`

The addition  is  = `[[3,5],[7,8]] + [[1,0],[0,1]]`

= `[[3+1,5+0],[7+0,8+1]]` .

= `[[4,5],[7,9]]`

This is the addition of matrices.

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