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Algebra

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Moderate

Geometric Series Starts At 5

ALGEBR-GUTL64

Find the sum of the terms from $n=5$ to $n=16$ of the geometric sequence $a_n=-7(8)^{n-1}$.

A

$-281474976706560$

B

$-281474976677888$

C

$-281474976714750$

D

$1$

E

None of the above