#matrix #inverse #3x3
Subscribe to the channel here: / @iqinitiative
Determinant of a 3x3 Matrix: • Determinant of a 3x3 M...
Other matrix videos: • Matrices
Facebook: www.facebook.c...
Tweeter: IQ...
How to find Inverse of a 3x3 Matrix | Co-factor Method
INVERSE OF A MATRIX
Definition
Let A be any square matrix. If there exists another square matrix B Such that AB = BA = I (I is a unit matrix) then B is called the inverse of the matrix A and is denoted by A-1.
The cofactor method is used to find the inverse of a matrix. Using matrices, the solutions of simultaneous equations are found.
Working Rule to find the inverse of the matrix
Step 1: Find the determinant of the matrix.
Step 2: If the value of the determinant is non zero proceed to find the inverse of the matrix.
Step 3: Find the cofactor of each element and form the cofactor matrix.
Step 4: The transpose of the cofactor matrix is the adjoint matrix.
Step 5: Apply the formula for the inverse
26 авг 2024