Under his cell phone plan, Owen pays a flat cost of $67.50 per month and $4 per gigabyte. He wants to keep his bill at $71.90 pe
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Given:
The matrix is .
To find:
The determinant of given matrix, i.e, .
Solution:
If a matrix is A of order , then the value of the determinant of that matrix is equal to the element of that matrix.
For example: Let A be the matrix of order .
Then,
The given matrix is . So, the determinant of given matrix, i.e,
, is
Therefore, the value of determinant of given matrix is -8.