Problem:
Consider the arithmetic sequence defined by $a_1=\frac{34}{43}$, and $a_n=a_{n-1}+\pi$ for $n > 1$. Compute the nth partial sum, $S_n=\sum_{k=1}^n a_k$, where $n=27$.
Answer:
$\frac{27}{2} \left(\frac{68}{43}+26 \pi \right)$
{'source': 'AMPS', 'file': 'amps/mathematica/algebra/arithmetic_series/32045.txt'}