WBJEE 2015 Math Solved Paper

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Question : 47 of 80

Marks: +1, -0

Let Xn = (1−

1

3

)2 (1−

1

6

)2 (1−

1

10

)2 ..... (1−

1

n(n+1)

2

)2 , n ≥ 2.
Then the value of

lim

n→∞

Xn is

1/3
1/9
1/81
0

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