Matrik Identitas

Matrik Invers

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Matriks Inverse dan Persamaan Linear

Ada Pertanyaan?

Cofactor

Jawab

Let us start in the top left-hand corner and work row by row. For cofactor A11, the element a11 = 2 lies in the first row and first column, so we delete this row and column to produce the 2 × 2 matrix

Next

For cofactor A12, the element a12 = 4 lies in the first row and second column, so we delete this row and

column to produce the 2 × 2 matrix

We are now in a position to describe how to calculate the determinant and inverse of a

3 × 3 matrix…

If we expand along the first row ofthe matrix..

It is immaterial which row or column we use. Let us choose the second row.

Matrik Inverse untuk 3x3

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