Express the Sum in Sigma Notation $$\frac { 1 } { 2 } + \frac { 1 } { 4 } + \frac { 1 } { 8 } + \frac { 1 } { 16 }$$

question 155

Multiple Choice

Express the sum in sigma notation.
- $$\frac { 1 } { 2 } + \frac { 1 } { 4 } + \frac { 1 } { 8 } + \frac { 1 } { 16 }$$

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

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