# 行列式/二階行列式/計算練習

1. ${\displaystyle {\begin{vmatrix}2&1\\5&4\end{vmatrix}}=5}$
2. ${\displaystyle {\begin{vmatrix}0.5&3\\1&4\end{vmatrix}}=}$
3. ${\displaystyle {\begin{vmatrix}20&3\\15&4\end{vmatrix}}=}$
4. ${\displaystyle {\begin{vmatrix}{\frac {1}{2}}&3\\1&4\end{vmatrix}}=}$
5. ${\displaystyle {\begin{vmatrix}{\frac {1}{2}}&3\\-1&4\end{vmatrix}}=}$
6. ${\displaystyle {\begin{vmatrix}-2&3\\1&4\end{vmatrix}}=}$
7. ${\displaystyle {\begin{vmatrix}2&{\sqrt {3}}\\{\sqrt {3}}&4\end{vmatrix}}=}$
8. ${\displaystyle {\begin{vmatrix}{\sqrt {2}}&-3\\1&{\sqrt {18}}\end{vmatrix}}=}$
9. ${\displaystyle {\begin{vmatrix}0&0\\1&4\end{vmatrix}}=}$
10. ${\displaystyle {\begin{vmatrix}2^{3}&3^{2}\\1&3\end{vmatrix}}=}$