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Arithmetic Sequences
medium
0:00.0
If
a
n
=
5
−
n
a_n = 5 - n
a
n
=
5
−
n
, find the sum of the first
4
4
4
terms.
A
6
6
6
B
8
8
8
C
10
10
10
D
12
12
12
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