Precalculus Examples

$\sum_{3}^{7} 6 - 4 n$

Step 1

Expand the series for each value of $n$ .

$6 - 4 \cdot 3 + 6 - 4 \cdot 4 + 6 - 4 \cdot 5 + \dots + 6 - 4 \cdot 7$

Step 2

Simplify the expanded form.

$- 70$

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