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Q.

limx→0− [x]+x2+x3+….+x2n+1+n+11+x2+[x]+2xn∈N is equals to

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a

n+1

b

n

c

1

d

0

answer is D.

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Detailed Solution

x2n+1=−1 and x2n=0 for n=0,1,2,3,….. given limit =limx→0− (−1)+0+(−1)+0+….+0+(−1)+n+11+0−1+2x=limx→0− (−1)(n+1)+n+12x=limx→0 02x=0
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