设yn=0.33.33 n个则当n趋向于无穷时,数列yn=
设yn=0.33.33 n个则当n趋向于无穷时,数列yn=
数列xn单调递增,yn单调递减,lim(xn-yn)=2(n趋向于正无穷),证明Xn Yn 皆收敛.
limxn=a lim(yn-xn)=0 则数列{yn} n趋于无穷
数列Xn有界,N趋近于无穷时Yn=0,证明N趋近于无穷时,Xn*Yn=0
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lim(n趋向于无穷大)yn=0,证明:limxnyn=0
设Yn=X(n-1)+2Xn,n=1,2,...证明:当数列Yn收敛时,数列Xn也收敛.
证明:若lim(n→∞)yn(数列yn)=A且A>0,则存在正整数N,当n>N时恒有yn>0.
设数列{xn}有界,又limn->无穷yn=0,证明证明limXn.Yn=0,并由此结论求极限limn->无穷[n/(n
设数列{Xn}有界,又lim(n趋近于正无穷)Yn=0,证明:lim(n趋近于正无穷)XnYn=0
设数列Xn有界,lim(n趋近于无穷)Yn=0,证明lim(n趋近于无穷)XnYn=0
设数列Xn有界,limYn=o ,limn趋向于正无穷.证明limXn.Yn=0