# Chapter 14 - Sequences, Series, and the Binomial Theorem - 14.1 Sequences and Series - 14.1 Exercise Set: 8

a)

#### Work Step by Step

If we evaluate the sum, we get: $\sum_{k=3}^6(-1)^k=(-1)^3+(-1)^4+(-1)^5+(-1)^6=-1+1+(-1)+1$ The answer is a).

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