Write the Series Using Summation Notation $$\frac { 3 } { 1 \cdot 2 } + \frac { 4 } { 2 \cdot 3 } + \frac { 5 } { 3 \cdot 4 } + \frac { 6 } { 4 \cdot 5 } + \frac { 7 } { 5 \cdot 6 }$$

Write the series using summation notation.
- $$\frac { 3 } { 1 \cdot 2 } + \frac { 4 } { 2 \cdot 3 } + \frac { 5 } { 3 \cdot 4 } + \frac { 6 } { 4 \cdot 5 } + \frac { 7 } { 5 \cdot 6 }$$

A) $\sum _ { \mathrm { i } = 1 } ^ { 5 } \frac { \mathrm { i } + 2 } { \mathrm { i } ( \mathrm { i } + 1 ) }$
B) $\sum _ { \mathrm { i } = 1 } ^ { 5 } \frac { \mathrm { i } + 2 } { \mathrm { i } ( \mathrm { i } - 1 ) }$
C) $\sum _ { \mathrm { i } = 1 } ^ { 5 } \frac { \mathrm { i } - 2 } { \mathrm { i } ( \mathrm { i } + 1 ) }$
D) $\sum _ { \mathrm { i } = 1 } ^ { 5 } \frac { \mathrm { i } } { \mathrm { i } ( \mathrm { i } + 1 ) }$

Correct Answer:

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