Find the value of the determinant.

$$\left|\begin{array}{rrr}2 & 1 & -1 \\ 4 & 7 & -2 \\ 2 & 4 & 0\end{array}\right|$$

Evaluate the given determinant. \

$$\left|\begin{array}{rrr}1 & 4 & 4 \\ 3 & 0 & -3 \\ 1 & 6 & 2\end{array}\right|$$

Find the determinant, and tell whether each matrix has an inverse.

$$\left[\begin{array}{ll}7 & 6 \\ 9 & 8\end{array}\right]$$

Find the value of the determinant.

$$\left|\begin{array}{rrr}7 & -1 & 1 \\ 1 & -7 & 2 \\ -2 & 1 & 1\end{array}\right|$$

Find the determinant of the matrix

$$\left[\begin{array}{rrr}-5 & 4 & 1 \\ 3 & -2 & 7 \\ 2 & 0 & 6\end{array}\right]$$

.

Find the value of the determinant.

$$\left|\begin{array}{rrr}1 & -2 & 3 \\ 0 & 0 & 0 \\ 1 & 10 & -12\end{array}\right|$$

Find the determinant of the matrix

$$A=\left[\begin{array}{rrr}2 & -5 & -1 \\ 4 & 6 & 5 \\ -2 & 0 & 3\end{array}\right]$$

.

Find the determinant, and tell whether each matrix has an inverse.

$$\left[\begin{array}{rr}2 & -5 \\ -1 & 3\end{array}\right]$$

Find the determinant of the matrix

$$\left[\begin{array}{lll} 1 & 2 & 3 \\ 2 & 0 & 4 \\ 0 & 5 & 7 \end{array}\right]$$

.

Find the value of the determinant.

$$\left|\begin{array}{rrr}.4 & -.8 & .6 \\ .3 & .9 & .7 \\ 3.1 & 4.1 & -2.8\end{array}\right|$$

Find the determinant of each matrix.

$$\left[\begin{array}{rr}4 & 8 \\ 9 & 3 \\ \frac{3}{2} & -81\end{array}\right]$$

Find the determinant of the matrix

$$\left[\begin{array}{rrr}2 & -3 & 5 \\ -4 & 1 & 3 \\ 3 & 2 & -1\end{array}\right]$$

.

Find the value of the determinant.

$$\left|\begin{array}{rrr}4 & -7 & 8 \\ 2 & 1 & 3 \\ -6 & 3 & 0\end{array}\right|$$

Evaluate the given determinant. \

$$\left|\begin{array}{rrr}1 & 0 & 0 \\ 3 & 1 & 2 \\ 1 & 5 & -2\end{array}\right|$$