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Find the Sum k=13(23)k+1\sum _ { \mathrm { k } = 1 } ^ { 3 } \left( \frac { 2 } { 3 } \right) ^ { \mathrm { k } + 1 }

Question 59

Multiple Choice

Find the sum.
- k=13(23) k+1\sum _ { \mathrm { k } = 1 } ^ { 3 } \left( \frac { 2 } { 3 } \right) ^ { \mathrm { k } + 1 }


A) 3827\frac { 38 } { 27 }

B) 7681\frac { 76 } { 81 }

C) 26081\frac { 260 } { 81 }

D) 8081\frac { 80 } { 81 }

Correct Answer:

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