Express the Sum in Sigma Notation $$- \frac { 1 } { 5 } + \frac { 2 } { 5 } - \frac { 3 } { 5 } + \frac { 4 } { 5 } - \frac { 5 } { 5 }$$

question 279

Multiple Choice

Express the sum in sigma notation.
- $$- \frac { 1 } { 5 } + \frac { 2 } { 5 } - \frac { 3 } { 5 } + \frac { 4 } { 5 } - \frac { 5 } { 5 }$$

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

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Definitions:

Distractible

A characteristic of an individual who is easily pulled away from focusing on something by external stimuli or thoughts.

Cross-modal Transfer

The ability to apply learning and adapt behaviors based on information received through different sensory modes.

Habituation/dishabituation

A behavioral process where an organism reduces its response to a repeated stimulus, and dishabituation occurs if a new stimulus alters the response.

Visual Preference

The tendency to selectively pay attention to certain visual stimuli over others, based on interest or attraction.