Geometric series

Topic Notes
A geometric series is the sum of a finite number of terms in a geometric sequence. Just like the arithmetic series, we also have geometric series formulas to help us with that.
The sum of  n  \, n\, terms of a geometric series:

Sn=t1(rn−1)r−1=r⋅tn−t1r−1\large S_n = \frac{t_1(r^{n}-1)} {r-1} = \frac{r \cdot t_{n} - t_{1}} {r-1}
Basic Concepts
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