Wednesday, 14 May 2014

logarithms - Limit of log with factor



Problem



If limnf(n)lognloglogn=y

where f is some function, does this imply that
limnf(n)log(xn)loglogn=y
for some xO(1)? Or does this give another Limit y?



Progress



For y=0 or y=±, I think, this factor x should not change anything, but for y(,0)(0,), I think this Limit should change, shouldn't it?



Answer



Notice that



log(xn)=logx+logn


so the limit is the same if y=± and it becomes y+logx if yR.


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