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Recurrence Relations
hard
0:00.0
Given
A
(
x
)
=
x
1
−
2
x
−
x
2
A(x) = \frac{x}{1-2x-x^2}
A
(
x
)
=
1
−
2
x
−
x
2
x
, find
a
1
a_1
a
1
.
A
1
1
1
B
2
2
2
C
0
0
0
D
3
3
3
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