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Recursion
easy
0:00.0
If
a
n
=
(
a
n
−
1
)
2
−
2
a_n = (a_{n-1})^2 - 2
a
n
=
(
a
n
−
1
)
2
−
2
and
a
1
=
3
a_1 = 3
a
1
=
3
, what is
a
2
a_2
a
2
?
A
9
B
7
C
5
D
8
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