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Arithmetic Sequences
easy
0:00.0
If
a
1
=
1
a_1 = 1
a
1
=
1
and
a
2
=
10
a_2 = 10
a
2
=
10
, then
a
3
=
a_3 =
a
3
=
:
A
11
B
19
C
20
D
100
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