Editor
Editor
 Sep 18, 2022
0
The sum of first n terms of an arithmetic series is
Difficulty: Easy
A: 
a+(n-1)d
B: 
$\frac{n}{2}(a_{1}+a_{2})$
C: 
$\frac{n}{2}[a+(n-1)d]$
D: 
n[2a+(n-1)d]
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NETNUST Entry TestMathematicsSequence and Series