Precalculus Examples

$\sum_{k = 1}^{5} 6 k$

Step 1

Expand the series for each value of $k$ .

$6 \cdot 1 + 6 \cdot 2 + 6 \cdot 3 + \dots + 6 \cdot 5$

Step 2

Simplify the expanded form.

$90$

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