lim (1+1/2+1/4+...+1/2^n) n趋于无穷

Lim(1-3/2n)^4n+5.n趋于无穷,求极限 lim(n趋于无穷)[n(n+1)/2]/n方+3n的极限是多少? 求极限,lim(1+n)(1+n^2)(1+n^4)-----(1+n^2n)=?（n趋于无穷） 求极限：lim((2n∧2-3n+1)/n+1)×sin n趋于无穷 求极限 Lim（n趋于无穷）(n^(2/3) sinn^2)/(n-1) 求极限 lim n趋于无穷 3n²+2n-1/2n²+n-10 lim x趋于无穷(1+2+...+n)除以n的平方,为何等于2分之1 lim(n趋于无穷)(1的n次方+2的n次方+3的n次方+4的n次方)的1/n次方=? lim n趋于无穷(2n+3/2n+1)的n+1次方的极限怎么求 lim 9^n+4^n+2/5^n-3^2n-1 n趋于无穷大时 lim[1/n-1/(n+1)+1/(n+2)-1/(n+3)+...+1/(2n-1)-1/2n] n趋于无穷的极限 1.求lim[1/(n2+n+1)+2/(n2+n+2)+.+n/(n2+n+n)][n趋于无穷][n2为n的平方]