lim (n→∞) (n^2/(an+b)-n^3/(2n^2-1))=1/4 求a,b
lim (n→∞) (n^2/(an+b)-n^3/(2n^2-1))=1/4 求a,b
已知:lim (n→∞) [(n^2+n)/(n+1)-an-b]=1 ,求a,b的值
求一道极限题lim[(a^1/n+b^1/n)/2]^n n→∞
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
lim(n2+2n+2)/(n+1)-an)=b,求a,b
求极限lim(n→∞)(a^n+(-b)^n)/(a^n+1+(-b)^n+1)
若lim(2n-√4n^2+an+3)=1,n→∞,求a.
a,b为常数.lim(n->无穷)an^2+bn+2/2n-1=3 求a,b
lim[(n^2+1)/(n+1)-an-b]=o求a和b的值 lim[1/(a-1)^n]=0 求a的范围
求lim n→∞ (1+2/n)^n+3
求极限的问题:lim(n→∞) {[a^(1/n)+b^(1/n)/2} 其中a,b大于0