Express the Sum in Sigma Notation $1 - 3 + 9 - 27 + 81$

question 148

Multiple Choice

Express the sum in sigma notation.
- $1 - 3 + 9 - 27 + 81$

• A) \(\sum _ { \mathrm { k } = 0 } ^ { 4 } ( - 1 ) ^ { \mathrm { k } } 3 ^ { \mathrm { k } }\)
• B) \(\sum _ { \mathrm { k } = - 2 } ^ { 2 } ( - 1 ) ^ { \mathrm { k } + 1 } 3 ^ { \mathrm { k } + 1 }\)
• C) \(\sum _ { k = - 1 } ^ { 3 } ( - 1 ) ^ { k + 1 } 3 ^ { k }\)
• D) \(\sum _ { k = 1 } ^ { 5 } ( - 3 ) ^ { k }\)

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