Problem:
Find the dot product of the following two vectors:
$\left(
\begin{array}{c}
 \frac{5}{\pi } \\
 \frac{12}{\pi } \\
 -\frac{4}{\pi } \\
 -\frac{10}{\pi } \\
\end{array}
\right)$ and
$\left(
\begin{array}{c}
 -\frac{17}{\pi } \\
 \frac{3}{\pi } \\
 -\frac{5}{\pi } \\
 \frac{21}{\pi } \\
\end{array}
\right)$.
Answer:
$-\frac{239}{\pi ^2}$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/dot_product/1905.txt'}