Precalculus Examples

$\sum_{i = 1}^{5} 8 i - 1$

Step 1

Expand the series for each value of $i$ .

$8 \cdot 1 - 1 + 8 \cdot 2 - 1 + 8 \cdot 3 - 1 + \dots + 8 \cdot 5 - 1$

Step 2

Simplify the expanded form.

$115$