Express the sum using summation notation. Use a lower limit of summation, not necessarily 1, and k for the index of
summation.
-$$\frac { 6 } { 7 } + \frac { 7 } { 8 } + \frac { 8 } { 9 } + \frac { 9 } { 10 } + \ldots + \frac { 19 } { 20 }$$
A) $\sum _ { k = 7 } ^ { 19 } \frac { k } { k + 1 }$
B) $\sum _ { k = 7 } ^ { 19 } \frac { k + 1 } { k }$
C) $\sum _ { k = 6 } ^ { 19 } \frac { k } { k + 1 }$
D) $\sum _ { \mathrm { k } = 6 } ^ { 19 } \frac { \mathrm { k } + 1 } { \mathrm { k } }$

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The Answer of Express the sum using summation notation. Use a lower limit of summation, not necessarily 1, and k for the index of
summation.
-$$\frac { 6 } { 7 } + \frac { 7 } { 8 } + \frac { 8 } { 9 } + \frac { 9 } { 10 } + \ldots + \frac { 19 } { 20 }$$
A) $\sum _ { k = 7 } ^ { 19 } \frac { k } { k + 1 }$
B) $\sum _ { k = 7 } ^ { 19 } \frac { k + 1 } { k }$
C) $\sum _ { k = 6 } ^ { 19 } \frac { k } { k + 1 }$
D) $\sum _ { \mathrm { k } = 6 } ^ { 19 } \frac { \mathrm { k } + 1 } { \mathrm { k } }$

Express the Sum Using Summation Notation 67+78+89+910+…+1920\frac { 6 } { 7 } + \frac { 7 } { 8 } + \frac { 8 } { 9 } + \frac { 9 } { 10 } + \ldots + \frac { 19 } { 20 }76​+87​+98​+109​+…+2019​

Express the Sum Using Summation Notation $\frac { 6 } { 7 } + \frac { 7 } { 8 } + \frac { 8 } { 9 } + \frac { 9 } { 10 } + \ldots + \frac { 19 } { 20 }$