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Find a Formula for the Sum of the N Terms 12,54,258,12516,\frac { 1 } { 2 } , \frac { 5 } { 4 } , \frac { 25 } { 8 } , \frac { 125 } { 16 } , \ldots

Question 30

Multiple Choice

Find a formula for the sum of the n terms of the sequence. 12,54,258,12516,\frac { 1 } { 2 } , \frac { 5 } { 4 } , \frac { 25 } { 8 } , \frac { 125 } { 16 } , \ldots


A) 5(5n2n) 3(2n) \frac { 5 \left( 5 ^ { n } - 2 ^ { n } \right) } { 3 \left( 2 ^ { n } \right) }
B) ​ 5n12\frac { 5 ^ { n - 1 } } { 2 }
C) 5n+2n7(2n) \frac { 5 ^ { n } + 2 ^ { n } } { 7 \left( 2 ^ { n } \right) }
D) 12n\frac { 1 } { 2 ^ { n } }
E) 5n2n3(2n) \frac { 5 ^ { n } - 2 ^ { n } } { 3 \left( 2 ^ { n } \right) }

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