KEAM 2012 Math Paper

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Question : 37 of 120

Marks: +1, -0

The sum of first n terms of the series

4

3

,

10

9

,

28

27

,

82

81

,

244

243

,... is

n+
1
2
(1+3−n)
n−
1
2
(1+3−n)
n+
1
2
(2+3−n)
n+
1
2
(2−3−n)
n+
1
2
(1−3−n)

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