Precalculus Examples

$\sum_{i = 1}^{5} 3^{i} - 5$

Step 1

Expand the series for each value of $i$ .

$3^{1} - 5 + 3^{2} - 5 + 3^{3} - 5 + \dots + 3^{5} - 5$

Step 2

Simplify the expanded form.

$338$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$