Sequence Recursive Relation Alpha (Jee Mains) | ExamDuo
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Sequence Recursive Relation Alpha
Consider the sequence
a
1
,
a
2
,
a
3
,
.
.
.
such that
a
1
−
1
,
a
2
−
2
and
a
n
+
2
=
2
a
n
+
1
+
a
−
n
for
n
−
1
,
2
,
3
,
.
.
.
If
(
a
1
+
1
a
2
a
3
)
⋅
(
a
2
+
1
a
3
a
4
)
⋅
(
a
3
+
1
a
4
a
5
)
.
.
.
(
a
30
+
1
a
31
a
32
)
=
2
α
(
61
C
31
)
, then
α
is equal to :
Ask about this question
SELECT ONE OPTION
A
−
30
B
−
31
C
−
60
D
−
61
Check