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Arithmetic Sequences
medium
0:00.0
If
a
3
=
5
a_3 = 5
a
3
=
5
and
a
4
=
8
a_4 = 8
a
4
=
8
, what is
a
1
a_1
a
1
?
A
1
1
1
B
−
1
-1
−
1
C
0
0
0
D
2
2
2
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