Write the Sum Using Summation Notation $$- \frac { 1 } { 3 } + \frac { 1 } { 9 } - \frac { 1 } { 27 } + \frac { 1 } { 81 } - \frac { 1 } { 243 }$$

question 36

Multiple Choice

Write the sum using summation notation.
- $$- \frac { 1 } { 3 } + \frac { 1 } { 9 } - \frac { 1 } { 27 } + \frac { 1 } { 81 } - \frac { 1 } { 243 }$$

• A) \(\sum _ { i = 1 } ^ { 5 } \left( ( - 1 ) ^ { i + 1 } \frac { 1 } { 3 i } \right)\)
• B) \(\sum _ { i = 1 } ^ { 5 } \left( ( - 1 ) ^ { i } \frac { 1 } { 3 i } \right)\)
• C) \(\sum _ { i = 1 } ^ { 5 } \left( ( - 1 ) ^ { i } \frac { 1 } { 3 ^ { i } } \right)\)
• D) \(\sum _ { i = 1 } ^ { 5 } \left( ( - 1 ) ^ { i + 1 } \frac { 1 } { 3 ^ { i } } \right)\)

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