Precalculus Examples

$\sum_{i = 1}^{5} 4 i + 4$

Step 1

Expand the series for each value of $i$ .

$4 \cdot 1 + 4 + 4 \cdot 2 + 4 + 4 \cdot 3 + 4 + \dots + 4 \cdot 5 + 4$

Step 2

Simplify the expanded form.

$80$