If S_{n}=\\sum_{r=1} ^{n} {2 r+1}/{r^{2}+2 r^{3}+r^{2}}, then S_{10} equals

JEE Advanced 2021 Full Test 4 Paper 1

PART – III

Mathematics

SECTION – A (One Options Correct Type)
This section contains 06 multiple choice questions. Each question has four choices (A), (B), (C) and (D), out of which ONLY ONE option is correct.

Question : 40 of 54

Marks: +1, -0

If Sn=

∑

r=1

2r+1

r2+2r3+r2

, then S10 equals

1
121
120
120
121
99
100

Validate

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