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 Sep 18, 2022
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$\sum_{n=1}^{\infty}\left(-\frac{3}{7}\right)^{2n}=\space?$
Difficulty: Easy
A: 
$\frac{9}{40}$
B: 
$\infty$
C: 
0
D: 
$\frac{3}{7}$
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NETNUST Entry TestMathematicsSequence and Series