JEE Mains 28-July-2022 Shift 1 Solved Paper

Section: Mathematics
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Question : 19 of 90
 
Marks: +1, -0
Consider the sequence a1,a2,a3,... such that a1−1,a2−2 and an+2=‌
2
an+1
+a−n
for n−1,2,3,... If (‌
a1+
1
a2
a3
)
⋅(‌
a2+
1
a3
a4
)
⋅(‌
a3+
1
a4
a5
)
.
.
.(‌
a30+
1
a31
a32
)
=2α(‌61C31)
, then α is equal to :
[28-Jul-2022-Shift-1]
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