设数列{Xn}有界,又limyn=0(n趋向于无穷大),证明:limxnyn=0(n趋向于无穷大).
设数列{Xn}有界,又limyn=0(n趋向于无穷大),证明:limxnyn=0(n趋向于无穷大).
设数列{xn}有界,又lim(n趋向于无穷大)yn=0,证明:limxnyn=0
设数列(Xn)趋于无穷n=1,有界,又limYn=0,证明limXnYn=0,求助!
设数列{Xn}有界且当n趋向于无穷大时,{Yn}极限为0,证明当n趋向于无穷大时Xn·Yn的极限为0
设数列Xn有界,又limYn=0 证明limXnYn=0
设数列{Xn}有界,又limYn=0,证明:limXnYn=0
设数列{Xn}有界,又LimYn=0,证明:LimXnYn=0.本人课没上,
设数列Xn有界,limYn=o ,limn趋向于正无穷.证明limXn.Yn=0
对于数列{Xn},若X2n-1趋向于a(k趋向于无穷大),X2k趋向a(k趋向无穷大),证明Xn趋向a(n趋向无穷大)
证明lim(n/(n^2+1))=0(n趋向于无穷大)
数列极限定义证明limn^(2/3)sinn/(n+1)=0,n趋向于无穷大,马上求解
设X1=1,Xn=1+X(n-1)/[1+X(n-1)],证明Xn在n趋向于无穷大时极限存在,并求其值