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a
(n!)"
b
(n!)1/n
c
n!
d
In n!
answer is B.
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Detailed Solution
limx→0 1x+2x+3x..........+nxn1x=1∞ sol is ekwhere k is k=lim x→0 1x+2x+3x+......nxn-1 1x k=limx →0 1x-1+2x-1+3x-1+..........+nx-1n 1x =(log1+log2+log3+............+logn)1n