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Recursion
easy
0:00.0
If
a
n
=
a
n
−
1
2
a_n = a_{n-1}^2
a
n
=
a
n
−
1
2
and
a
1
=
2
a_1 = 2
a
1
=
2
, what is
a
2
a_2
a
2
?
A
4
B
2
C
8
D
16
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