Use the Summation Formulas to Rewrite the Expression $\sum _ { k = 1 } ^ { n } \frac { 24 k ( k - 1 ) } { n ^ { 7 } }$

question 79

Multiple Choice

Use the summation formulas to rewrite the expression $\sum _ { k = 1 } ^ { n } \frac { 24 k ( k - 1 ) } { n ^ { 7 } }$
without the summation notation.

• A) \(\frac { 4 } { n ^ { 5 } } - \frac { 1 } { n ^ { 6 } }\)
• B) \(\frac { 8 } { n ^ { 5 } } - \frac { 4 } { n ^ { 6 } }\)
• C) \(\frac { 4 } { n ^ { 4 } } - \frac { 4 } { n ^ { 6 } }\)
• D) \(\frac { 8 } { n ^ { 4 } } + \frac { 2 } { n ^ { 7 } }\)
• E) \(\frac { 8 } { n ^ { 4 } } - \frac { 8 } { n ^ { 6 } }\)

---

Definitions:

Main Supporting Points

The key arguments or pieces of evidence that back up the central idea or thesis in a written work or presentation.

Indirect Approach

A communication style that is more subtle and nuanced, often involving suggestions and implications rather than direct statements.

Direct Approach

A communication method where the main idea or request is presented at the beginning, followed by supporting details.

Death By PowerPoint

A phenomenon where an audience becomes bored and disengaged due to a dull and overly detailed PowerPoint presentation.