JEE Advanced 2020 Full Test 5 Paper 2

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Question : 40 of 54

Marks: +1, -0

If Sn denotes the sum of first n terms of an AP and an=‌

S3n

S2n−Sn

, then

Lt

n→∞

‌

2n

∑

r=1

‌

ar

n

is equal to

2
4
6
8

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