lim(n→∞) an=2,lim(n→∞) bn=1,求lim(n→∞) (an-bn)/(an+bn)
等差数列{an},{bn}的前n项和分别为An,Bn,切An/Bn=2n/3n+1,求lim(n→∞)an/bn
lim (n→∞) [(an^2+bn+c)/(2n+5)]=3,求a,b
已知lim n→无穷 (an^2+bn+5)/(3n-2)=2,求a,b的值
高二的极限运算题 lim(2an+4bn)=8,lim(6an-bn)=1,求lim(3an+bn)的值 n趋向于无穷大
等差数列{An},{Bn}的前n项和分别是Sn和Tn,若Sn/Tn=2n/(3n+1),则lim x→∞(An/Bn)等
a,b为常数.lim(n->无穷)an^2+bn+2/2n-1=3 求a,b
lim(n->无穷)[(3n^2+cn+1)/(an^2+bn)-4n]=5
lim[{根号(n^2+an)}-(bn+1)]=b,求a
等差数列an,bn的前n项和分别为Sn,若Sn/Tn=2n/(3n+1),求lim an/bn
lim(5n-根号(an^2+bn+c))=2,求实数a,b,c
若lim[2n+(an^2+2n+1)/(bn+1)=1,则a+b
数列的极限高中lim(2bn^2+4n+an^2-2n+1)/(bn+2)=1