Express the Sum Using Summation Notation $$\frac { 1 } { 3 } + \frac { 1 } { 2 } + \frac { 3 } { 5 } + \ldots + \frac { 6 } { 7 }$$

Multiple Choice

Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.
- $$\frac { 1 } { 3 } + \frac { 1 } { 2 } + \frac { 3 } { 5 } + \ldots + \frac { 6 } { 7 }$$

A) $\sum _ { i = 2 } ^ { 12 } \frac { i } { i + 1 }$
B) $\sum _ { i = 1 } ^ { n } \frac { i } { i + 2 }$
C) $\sum _ { i = 0 } ^ { 12 } \frac { i } { i + 2 }$
D) $\sum _ { i = 1 } ^ { 12 } \frac { i } { i + 2 }$