In the last post, I discussed about calculating minors of elements of given matrix. Co-factor is not very different from minors in some sense. Almost Half of the elements present in the matrix have same co-factors as their minors whereas, the rest have co-factors equal
Minors of elements present in the Matrix
Every element present in the square matrix has minor. For example, we want to calculate minor of element a11, then we eliminate 1st row and 1st column from the matrix and calculate determinant of remaining matrix. The determinant of that remaining matrix is minor of a11. Similarly, if we want to calculate minor of element a12 then we eliminate 1st row and 2nd column from the matrix,
Calculating Determinant of 3 x 3 matrices
In the last post, I discussed about calculating determinants of 1 x 1 and 2 x 2 matrices. This post will teach you to calculate determinants of 3 x 3 matrices. The procedure is to choose any row or column from the matrix. It is better to choose a row or column which is having
Determinant of Matrix
With every square matrix, we can associate a number which is called determinant of matrix. It is denoted by |A| for matrix A. In this post, we will learn how to calculate determinant of 1 x 1, 2 x 2 and 3 x3 matrices. We can also calculate value of determinant of different square matrices with the help of co-factors. [Read more…]