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Arithmetic Sequences
hard
0:00.0
Given
S
n
=
n
2
S_n = n^2
S
n
=
n
2
, find the
n
t
h
n^{th}
n
t
h
term.
A
2
n
−
1
2n-1
2
n
−
1
B
2
n
+
1
2n+1
2
n
+
1
C
n
n
n
D
n
2
n^2
n
2
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