Tuesday, January 17, 2017

real analysis - Why : 1+infty is not 1 however 1+infty=limxto0+(fracsinxx)1/x=1?





It is well known that :1+ is indeterminate case ,I have accrossed the following problem which let me to say that :1+=1 .



1+ can be written as : 1+=limx0+(sinxx)1/x which is 1 ,then 1+=1 and it's not I.case , i don't know where i'm wrong !!!! ? and wolfram alpha says that :limx0+(sinxx)1/x=1 which mixed me .



Edit: I have edited the question to show what's mixed me in the side of

limit calculation and i don't changed my question


Answer



If you think that
limx0+(sinxx)1/x=(limx0+sinxx)limx0+1/x


that is not correct. Here, you can find your answer I think: Why is 1 considered to be an indeterminate form


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