lim(n->无穷)[(3n^2+cn+1)/(an^2+bn)-4n]=5求常数a、b、c

lim(n->无穷)[(3n^2+cn+1)/(an^2+bn)-4n]=5求常数a、b、c lim(2^n+3^n)^1 (n趋向无穷) 高数 lim n趋向无穷 lim（3^(1/n)-1)ln(2+2^n) lim(1/n^3+(1+2)/n^3+...+(1+2+...+n)/n^3)n趋于无穷 lim(n+2)(n-1)/3n^2+2n+1= n趋近于无穷 1、lim n->无穷 根号[(n^4+n+1)-n^2]*(3n+4) lim[1^n+2^n+3^n]^(1/n)等于多少n→无穷 lim(n趋于无穷)[n(n+1)/2]/n方+3n的极限是多少? 设{an},{bn},{cn}均为非负数列,且lim(n->无穷)an=0,lim(n->无穷)bn=1lim(n->无穷) lim(n->无穷)[(1+3+5+.(2n+1)]/n^2]^(3-2n) lim x趋向于无穷 (2^n+1+3^n+1)/(2^n+3^n)= 求lim趋向于无穷3^n+(-2)^n/3^(n+1)+(-2)^(n+1) lim(n趋近于无穷)(1+2+3+.+n)/(3n^2+4n)等于多少 lim(x趋向于无穷)2^n-3^n/2^n+3^n lim(n-无穷)=3n^2/5n^2+2n-1, 求lim(n->无穷)(3n+5)/(n^2+n+4)^1/2的极限 求极限：lim((2n∧2-3n+1)/n+1)×sin n趋于无穷 lim(n→正无穷)【n+2/n+1】的3n次方