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Recursion
easy
0:00.0
If
a
n
=
2
a
n
−
1
a_n = 2a_{n-1}
a
n
=
2
a
n
−
1
and
a
0
=
1
a_0 = 1
a
0
=
1
, what is
a
3
a_3
a
3
?
A
2
B
4
C
8
D
16
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