\[ a_k = \left( \frac{k \cdot 3^k}{2} \right) \left( \frac{-1k}{3k} \right) = \left( \frac{k \cdot (-1)^k}{2} \right) \]
Mathbot Says...
I wasn't able to parse your question, but the HE.NET team is hard at work making me smarter.
\[ a_k = \left( \frac{k \cdot 3^k}{2} \right) \left( \frac{-1k}{3k} \right) = \left( \frac{k \cdot (-1)^k}{2} \right) \]
I wasn't able to parse your question, but the HE.NET team is hard at work making me smarter.