Express the Sum in Sigma Notation $$\frac { 1 } { 3 } + \frac { 1 } { 9 } + \frac { 1 } { 27 } + \frac { 1 } { 81 }$$

question 49

Multiple Choice

Express the sum in sigma notation.
- $$\frac { 1 } { 3 } + \frac { 1 } { 9 } + \frac { 1 } { 27 } + \frac { 1 } { 81 }$$

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

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