lim(n-无穷)=3n^2/5n^2+2n-1,

lim(n->无穷)[(3n^2+cn+1)/(an^2+bn)-4n]=5 求极限 lim(n->无穷)[(3n^2-2)/(3n^2+4)]^[n(n+1)] lim(n趋于无穷)[n(n+1)/2]/n方+3n的极限是多少? 求极限：lim((2n∧2-3n+1)/n+1)×sin n趋于无穷 求极限：lim(x→无穷)(2^n-7^n)/(2^n+7^n-1)=? 高数求极限lim（1+2^n+3^n)^1/n n趋近于无穷 求极限lim(1+2^n+3^n)^1/n.n-->无穷. lim(n→正无穷)【n+2/n+1】的3n次方 求极限,lim(1+n)(1+n^2)(1+n^4)-----(1+n^2n)=?（n趋于无穷） 高数 lim n趋向无穷 lim（3^(1/n)-1)ln(2+2^n) lim n趋近无穷 3n^3+n^2-3/4n^3+2n+1的极限 求极限 lim n趋于无穷 3n²+2n-1/2n²+n-10