Calculus Examples

$\sum_{j = 1}^{8} {(- 1)}^{j} j$

Step 1

Expand the series for each value of $j$ .

${(- 1)}^{1} \cdot 1 + {(- 1)}^{2} \cdot 2 + {(- 1)}^{3} \cdot 3 + \dots + {(- 1)}^{8} \cdot 8$

Step 2

Simplify the expanded form.

$4$