<p>Now ,in practice when we apply this formula, we have a choice to make when we perform the actual calculations.  Let us use an example to illustrate.</p>
<p>Find the sum of the first \(n\) terms of the geometric series:</p>
<ol class="abc-list"><li><div class="list-item-content"><span class="list-item-text">\(2-6+18-\dots\)</span></div></li><li><div class="list-item-content"><span class="list-item-text">\(1+\frac{1}{3}+\frac{1}{3^2}+\frac{1}{3^3}+\dots\)</span></div></li></ol>

Now ,in practice when we apply this formula, we have a choice to make when we perform the actual calculations.  Let us use an example to illustrate.

Find the sum of the first \(n\) terms of the geometric series:

\(1+\frac{1}{3}+\frac{1}{3^2}+\frac{1}{3^3}+\dots\)

Geometric Progression

APGP

International Baccalaureate Higher Level Mathematics

Example of GP: choice of formulae

Example of GP: choice of formulae