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Question

limn n((2n+1)2)(n+2)(n2+3n1) =


A

0

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B

2

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C

4

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D

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Solution

The correct option is C

4


limn n(2n+1)2(n+2)(n2+3n1)
= limn(4n3+4n2+n)(n3+5n2+5n2)
=limn n3×(4+4n+1n2)n3(1+5n+5n22n3) =4


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