已知lim n→∞ (an^2/3n+1-n)=b,a+b=?
已知:lim (n→∞) [(n^2+n)/(n+1)-an-b]=1 ,求a,b的值
lim (n→∞) (n^2/(an+b)-n^3/(2n^2-1))=1/4 求a,b
已知lim[(an^2+5n-2)/(3n+1)-n]=b,求a,b的值
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
lim(n2+2n+2)/(n+1)-an)=b,求a,b
已知lim((an2+5n-2)/(3n+1) -n)=b 求a b的值
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
求极限lim(n→∞)(a^n+(-b)^n)/(a^n+1+(-b)^n+1)
已知数列an的前n项和Sn=(n^2+n)*3^n (1)求lim(n→∞)an/Sn (2).
已知lim(n的平方+1/n+1+an-b)=1,求a,b的值