lim(n->无穷)[(3n^2+cn+1)/(an^2+bn)-4n]=5
lim(n->无穷)[(3n^2+cn+1)/(an^2+bn)-4n]=5
已知lim[(3n^2+cn+1)/(an^2+bn)-4n]=5,求常数a、b、c的值
已知lim n→无穷 (an^2+bn+5)/(3n-2)=2,求a,b的值
a,b为常数.lim(n->无穷)an^2+bn+2/2n-1=3 求a,b
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=4n-2和bn=2/4^(n-1),设Cn=an/bn,求数列{Cn}的前n项和Tn
lim (n→∞) [(an^2+bn+c)/(2n+5)]=3,求a,b
已知数列an,bn,cn满足[a(n+1)-an][b(n+1)-bn]=cn
求极限 lim(n->无穷)[(3n^2-2)/(3n^2+4)]^[n(n+1)]
已知数列{an}的通项an=2n,{bn}的通项为bn=(1/3)^n,令cn=an*bn,求{cn}的前n项和
已知数列{an}是an=2^n,bn=3n+1的等比数列,Cn=(3n+1)*2^n求Sn.要完整过程.
数列的极限高中lim(2bn^2+4n+an^2-2n+1)/(bn+2)=1