Wednesday, 13 August 2014

real analysis - Prove that limlimitsntoinftyfracSnsSn+s=0 implies limlimitsnrightarrowinftySn=s


Prove that if
limnSnsSn+s=0

then limnSn=s





Hint: Define tn=SnsSn+s and solve for Sn



By the hint:
tn=SnsSn+s


(Sn+s)tn=Sns

Sn(tn1)=sstn

Sn=s1+tntn1



limnSn=s1+limntnlimntn1




As limnSnsSn+s=limntn=0, it follows:



limnSn=s



Is my argumentation correct/appropriate?Anything needs to be added?



Much appreciated for your input.

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