Express the Sum in Sigma Notation $$- \frac { 1 } { 7 } + \frac { 2 } { 7 } - \frac { 3 } { 7 } + \frac { 4 } { 7 } - \frac { 5 } { 7 }$$

question 66

Multiple Choice

Express the sum in sigma notation.
- $$- \frac { 1 } { 7 } + \frac { 2 } { 7 } - \frac { 3 } { 7 } + \frac { 4 } { 7 } - \frac { 5 } { 7 }$$

• A) \(\sum _ { \mathrm { k } = 1 } ^ { 5 } ( - 1 ) ^ { \mathrm { k } + 1 } \frac { \mathrm { k } } { 7 }\)
• B) \(\sum _ { \mathrm { k } = 1 } ^ { 5 } ( - 1 ) ^ { \mathrm { k } } \frac { \mathrm { k } } { 7 }\)
• C) \(\sum _ { \mathrm { k } = 0 } ^ { 5 } ( - 1 ) ^ { \mathrm { k } - 1 } \frac { \mathrm { k } } { 7 }\)
• D) \(\sum _ { k = 1 } ^ { 4 } ( - 1 ) ^ { k } \frac { k + 1 } { 7 }\)

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Definitions:

Job Characteristics Model

A theory that proposes that the nature of a person's job can influence their job satisfaction and performance.

Task Identity

The degree to which a job requires completion of a whole and identifiable piece of work, contributing to a worker's sense of achievement and job satisfaction.

Selective Perception

The tendency to notice and interpret elements in our environment based on our expectations, beliefs, and attitudes.

Social Perception

The process by which individuals form impressions of and make inferences about other people and events in their social world.