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JEE Mains 25-July-2022 Shift 2 Solved Paper

Section: Mathematics
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Question : 27 of 90
 
Marks: +1, -0
Let an=
n
∫
−1
(1+‌
x
2
+‌
x2
3
+.....+‌
xn−1
n
)dx for every n∈N. Then the sum of all the elements of the set {n∈N:an∈(2,30)} is___
[25-Jul-2022-Shift-2]
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