Question

write the condition to have determinant of matrices?

Answer 1

Answer:

Hope it helps....

Expanding to Find the Determinant

Pick any row or column in the matrix.

It does not matter which row or which column you use, the answer will be the same for any row.

Multiply every element in that row or column by its cofactor and add.

The result is the determinant.

Answer 2

Answer:

Determinant is a special number that is defined for only square matrices (plural for matrix). Square matrix have same number of rows and columns.

Determinant is used to know whether the matrix can be inverted or not, it is useful in analysis and solution of simultaneous linear equations (Cramer’s rule), used in calculus, used to find area of triangles (if coordinates are given) and more. Determinant of a matrix A is denoted by |A|