Friday, March 1, 2013

Application of Matrices


Introduction to learn applications of matrices::
A Matrix in plural matrices or less commonly matrices, is a rectangular array of numbers. Matrices are a key tool in linear algebra. One use of matrices is representing linear transformations, which are higher-dimensional analogs of linear functions of the form f(x) = cx, where c is a constant; matrix multiplication corresponds to composition of linear transformations.
(Source : wikipedia)

In this article, we shall learn the applications of matrices. I like to share this Augmented Matrix with you all through my article.



Learn Application of matrices to check properties:


(1) Matrix addition is commutative:

If A and B are any two matrices of the same order then A + B = B + A. This property is known as commutative property of matrix addition.

(2) Matrix addition is associative:

I.e. If A, B and C are any three matrices of the same order.

Then A+ (B + C) = (A+B) +C.  This property is known as associative property of matrix addition.

(3) Additive identity:

Let A be any matrix then A + O = O + A = A. This property is known as identity property of matrix addition. The zero matrix O is known as the identity element with respect to matrix addition.

(4) Additive inverse:

Let A be any matrix then its matrix is –A then the property is A + (- A) = (- A) + A = O. This property is known as inverse property with respect to matrix addition. The negative of matrix A  i.e. - A is the inverse of A with respect to matrix addition. Please express your views of this topic answers for algebra 2 problems by commenting on blog.


More Applications to learn matrices:


(1) In general, matrix multiplication is not commutative i.e. AB ? BA

(1) In general, matrix multiplication is not commutative i.e. AB ? BA

(2) Matrix multiplication is always associative.

I.e. A (BC) = (AB) C

(3) Matrix multiplication is always distributive over addition.

I.e. (i) A (B + C) = AB + AC

(ii) (A + B) C = AC + BC

(4) AI = IA = A where I is the unit matrix or identity matrix. This is known as Identity property of matrix multiplication.

This is how, we can learn the applications of matrices.

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