limxn=0,limxn+1/xn=a,证明|a|≤1lim(xn)=0,lim((xn+1)/(xn))=a,证明|a|≤1

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limxn=0,limxn+1/xn=a,证明|a|≤1lim(xn)=0,lim((xn+1)/(xn))=a,证明|a|≤1
limxn=0,limxn+1/xn=a,证明|a|≤1
lim(xn)=0,lim((xn+1)/(xn))=a,证明|a|≤1

limxn=0,limxn+1/xn=a,证明|a|≤1lim(xn)=0,lim((xn+1)/(xn))=a,证明|a|≤1
if for some n,|xn|>1,then |xi| keep growing from then on.
so |a|≤1