Sn=-9/2 (2n-1)
solve for n
You asked:
Solve the equation \[S n = \frac{-9}{2 \left(2 n - 1\right)}\] for the unknown \(n\).
MathBot Answer:
$$\begin{aligned}n &= \frac{1}{4} - \frac{\sqrt{S \left(S - 36\right)}}{4 S}\\n &= \frac{1}{4} + \frac{\sqrt{S \left(S - 36\right)}}{4 S}\end{aligned}$$ and \(n \neq \frac{1}{2}\)