Use Summation Notation
- $$\sum _ { k = 1 } ^ { 4 } ( - 1 ) ^ { k } ( k + 4 )$$

Use Summation Notation
- $$\sum _ { k = 1 } ^ { 4 } ( - 1 ) ^ { k } ( k + 4 )$$

A) 2
B) $- 26$
C) 26
D) 18