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Write the Series Using Summation Notation 312+423+534+645+756\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 }

Question 233

Multiple Choice

Write the series using summation notation.
- 312+423+534+645+756\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) i=15i+2i(i+1) \sum _ { \mathrm { i } = 1 } ^ { 5 } \frac { \mathrm { i } + 2 } { \mathrm { i } ( \mathrm { i } + 1 ) }
B) i=15i+2i(i1) \sum _ { \mathrm { i } = 1 } ^ { 5 } \frac { \mathrm { i } + 2 } { \mathrm { i } ( \mathrm { i } - 1 ) }
C) i=15i2i(i+1) \sum _ { \mathrm { i } = 1 } ^ { 5 } \frac { \mathrm { i } - 2 } { \mathrm { i } ( \mathrm { i } + 1 ) }
D) i=15ii(i+1) \sum _ { \mathrm { i } = 1 } ^ { 5 } \frac { \mathrm { i } } { \mathrm { i } ( \mathrm { i } + 1 ) }

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