matrix

\[
\mathbf{A} =
\begin{pmatrix}
a + b + c & uv\\
a + b & u + v
\end{pmatrix}
\begin{vmatrix}
30 & 7\\
3 & 17
\end{vmatrix}
\]

Result, #, 計算

$
n=4,x_1=3,x_2=2,x_3=3,x_4=4, $ 求 \\
$ \sum_{i=1}^{n} x_{i}^{2} =38, \qquad
\prod_{i=1}^{n} x_{i}^{2}
=5184.
$
\\

級數, sum, product

試看看吧!
級數, sum, product