### Determinants

How do you find a determinant?
Part 1 Finding the Determinant
1. Write your 3 x 3 matrix. ...
2. Choose a single row or column. ...
3. Cross out the row and column of your first element. ...
4. Find the determinant of the 2 x 2 matrix. ...

If two determinants differ by just one column, we can add them together by justadding up these two columns. For example: ... All other elementary row operationswill not affect the value of the determinant!

What does it mean for a determinant to be 0?
When the determinant of a matrix is zero, the system of equations associated with it is linearly dependent; that is, if the determinant of a matrix is zero, at least one row of such a matrix is a scalar multiple of another.

What does it mean when the determinant is 1?
Determinants are defined only for square matrices. If the determinant of a matrix is 0, the matrix is said to be singular, and if the determinant is 1, the matrix is said to be unimodular. ... Note that the notation may be more convenient when indicating the absolute value of a determinant, i.e., instead of .

How do you find the determinant on a calculator?
To evaluate the determinant of a matrix, follow these steps:
1. If necessary, press [2nd][MODE] to access the Home screen.
2. To select the det( command from the MATRX MATH menu, press.
3. Enter the matrix. ...
4. Press [ENTER] to evaluate the determinant.