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Arithmetic Sequences
easy
0:00.0
If
a
1
=
1
a_1 = 1
a
1
=
1
and
d
=
−
2
d = -2
d
=
−
2
, what is
a
3
a_3
a
3
?
A
-1
B
-3
C
1
D
3
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