Write the Sum Using Summation Notation $$- 3 + 9 - 27 + 81$$

question 126

Multiple Choice

Write the sum using summation notation.
- $$- 3 + 9 - 27 + 81$$

• A) \(\sum _ { n = 1 } ^ { 4 } ( - 1 ) ^ { n _ { 3 } n }\)
• B)\(\sum_{n=1}^{4}(-1)^{n+1} 3^{n}\)
• C) \(\sum _ { n = 1 } ^ { 4 } ( - 1 ) ^ { n + 1 } n\)
• D) \(\sum _ { n = 1 } ^ { 4 } ( - 1 ) ^ { n _ { n } }\)

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