lim(an平方+bn)/(bn平方+an+b)=2/3
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
已知数列{an},{bn}的前n项和Sn、Tn,Sn=2n平方+3n,Tn=2-bn求通项公式an,bn
若lim[(an^2+bn+c)/(2n-3)]=-2,则a+b=
lim (n→∞) [(an^2+bn+c)/(2n+5)]=3,求a,b
lim(3an+4bn)=8 lim(6an-bn)=1 求lim(3an+bn) 要设3an+4bn=m 6an-bn
已知lim(3An+4Bn)=8,lim(6An-Bn)=1,求lim(3An+Bn)的值
已知lim(3an+4bn)=8,lim(6an-bn)=1,则lim(3an+bn)的值是多少
数列{an},{bn}满足anbn=1,an=n*n(n的平方)+3n+2,则{bn}的前10项之和为()
已知数列{an},an=2n-1,{an}和{bn}满足等式an=b1/2+b2/2平方+b3/2三次方+.bn/2的n
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
a,b为常数.lim(n->无穷)an^2+bn+2/2n-1=3 求a,b
若lim[2n+(an^2+2n+1)/(bn+1)=1,则a+b