求极限 lim【1/（n^2+n+1）+2/（n^2+n+2）+3/（n^2+n+3）+……+n

求极限lim(x→∞)（1/n+2/n+3/n..+n/n） 求极限 lim n[1/(n^2+1)+1/(n^2+2^2）+……+1/(n^n+n^n)] (n趋向于无穷大,n^n 求极限 lim【1/（n^2+n+1）+2/（n^2+n+2）+3/（n^2+n+3）+……+n 求极限：lim(n→∞)[（3n+1 ）/（3n+2）]^(n+1) 求极限 lim(n->无穷)[(3n^2-2)/(3n^2+4)]^[n(n+1)] 求极限lim [ 2^(n+1)+3^(n+1)]/2^n+3^n (n→∞) lim n →∞ (1^n+3^n+2^n)^1/n,求数列极限 求极限,lim(1+n)(1+n^2)(1+n^4)-----(1+n^2n)=?（n趋于无穷） 求极限lim(1/2n+3/4n+……+(2^n-1)/(2^n*n)) 求极限 n趋向于无穷 lim（(根号下n^2+1)/(n+1)）^n lim（1/n+2^1/n）^n n→∞求详解!高数极限 求极限lim(n趋向于无穷）(n+1)(根号下(n^2+1)-n)