find the sum of series
∑(-3/4)^k-1 for k=1 to ∞
Am I missing something Dan? Isn't $\displaystyle \sum_{k=0}^{ \infty} \left( \frac {3}{4} \right)^{k - 1} = \sum_{k=0}^{ \infty} \left( \frac {3}{4} \right)^{-1} \left( \frac {3}{4} \right)^k = \left( \frac {4}{3} \right) \sum_{k = 0}^{ \infty} \left( \frac {3}{4} \right)^k$
Forgive me if I said something stupid, I'm not fully awake at the moment