quinta-feira, março 08, 2012

Matrices

Matrices are mathematical structures arranged in a table with rows and columns used to organize data and information. In matters related to algebra, matrices are responsible for solving linear systems. They can be built with m rows and n columns, note:


matrix of order 3 x 1. (3 rows and 1 column).


, x 3 matrix of order 2. (3 rows and 2 columns)

x 4 matrix of order 2. (4 rows and 2 columns)


,matrix of order 1 x 4. (1 row and 4 columns)


The number of matrices with equal rows and columns are calledsquare matricesNote:


square matrix of order 2 x 2.


square matrix of order 3 x 3.




, square matrix of order 4 x 4.


in matrix  ,have every element occupies its place according to the following location:
The second element is in the 1st row and 1st column.
The element 5 is in the 1st row and 2nd column.
The element 7 is in the 2nd row and 1st column.
-9 The element is in the 2nd row and 2nd column.

Therefore, we have:

aij, where i = j = rows and columns.
a11 = 2
a12 = 5
a21 = 7
22 = -9

We can construct a matrix according to a law-based training in various situations. For example, we build a matrix of order 3 x 3, following the direction ij = 3i + 2j.
We write the matrix given by B (ij) 4x4, so that i + j, where i = Jei - j, where i ≠ j.By: Bianca Carina