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Mathematics
Mathematics
Problem
For an arithmetic progression the sum of the first
n
n
n
terms is given by
S
n
=
3
n
2
+
5
n
S_n=3n^2+5n
S
n
=
3
n
2
+
5
n
. The general term
a
n
a_n
a
n
equals a)
6
n
+
5
6n+5
6
n
+
5
b)
6
n
+
2
6n+2
6
n
+
2
c)
3
n
+
5
3n+5
3
n
+
5
d)
6
n
−
2
6n-2
6
n
−
2
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