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Editor
 Sep 18, 2022
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If $S_{n}=n^{3}$ for an Arithmetic Progression, then $a_{n}=?$
Difficulty: Easy
A: 
$n^{3}-a_{1}$
B: 
$n^{3}+a_{1}$
C: 
$2n^{2}-a_{1}$
D: 
$n^{2}-a_{1}$
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NETNUST Entry TestMathematicsSequence and Series