Inverse Of A 3x3 Matrix Shortcut

In this video you will find a cool trick shortcut method to find inverse matrices of 3x3 matrix. Next transpose the matrix by rewriting the first row as the first column the middle row as the middle column and the third row as the third column. As another hint i will take the same matrix matrix a and take its determinant again but i will do it using a different technique either technique is valid so here we saying what is the determinant of the 3x3 matrix a and we can is we can rewrite first two column so first column right over here we could rewrite it as 4 4 2 and then the second column right over here we could rewrite it 1 5.

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Determinant of a 3x3 matrix.

Inverse of a 3x3 matrix shortcut.

Sal shows how to find the inverse of a 3x3 matrix using its determinant. To find the inverse of a 3x3 matrix first calculate the determinant of the matrix. Finding inverse of a matrix short cut method. It seems about the same complexity as just plodding through row column operations to convert the 3x3 into an identity matrix and applying those operations to an identity matrix at the same time.

For every m m square matrix there exist an inverse of it. Elements of the matrix are the numbers which make up the matrix. Quicker way to inverse 3 3 matrix august 31 2014 tomcircle modern math leave a comment this is a quick method to inverse a matrix using the analogy of determinant. This super trick will help you find inverse of any 3x3 matrix in just 30 seconds.

This method is very fast and saves a lot of time. If the determinant is 0 the matrix has no inverse. We should practice. I thought that that isn t much of a trick or shortcut.

In part 1 we learn how to find the matrix of minors of a 3x3 matrix and its cofactor matrix. The inverse of a matrix cannot be evaluated by calculators and using shortcuts will be inappropriate. A singular matrix is the one in which the determinant is not equal to zero. Determinant of a 3x3 matrix.

Shortcut method 2 of 2 practice. It is represented by m 1.

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