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Question

Evaluate limnnr=112r

A
0
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B
1
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C
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D
12
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E
2
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Solution

The correct option is A 1
nr=112r=12{1(12)n}{112}=1(12)n
which tends to 10=1 as n.
limnnr=1122=1
Hence, option 'B' is correct.

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