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Evaluate the Sum $\sum _ { k = 1 } ^ { 4 } ( - 1 ) ^ { k } \cdot - 2 k$

Question 223

Multiple Choice

Evaluate the sum. Round to two decimal places, if necessary.
- $\sum _ { k = 1 } ^ { 4 } ( - 1 ) ^ { k } \cdot - 2 k$

A) 20
B) $- 4$
C) $- 20$
D) 16

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