Find a Formula for the Nth Partial Sum of the Series

question 137

Multiple Choice

Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges.
- $$\frac { 7 } { 2 \cdot 3 } + \frac { 7 } { 3 \cdot 4 } + \frac { 7 } { 4 \cdot 5 } + \ldots + \frac { 7 } { ( n + 1 ) ( n + 2 ) } + \ldots$$

• A) \(\frac { 7 n } { n + 2 } ; 7\)
• B) \(\frac { 7 n } { 2 ( n + 1 ) } ; \frac { 7 } { 2 }\)
• C) \(\frac { 7 n } { 2 ( n + 2 ) } ; \frac { 7 } { 2 }\)
• D) \(\frac { 7 n } { n + 1 } ; 7\)

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