极限limn→无穷 (2n^2-3n+1)/n+1 sin1/n

极限limn→无穷 (2n^2-3n+1)/n+1 sin1/n 求极限,limn^2{arctan(1/n)-arctan(1/1+n)}n→无穷. 求limn→无穷(1+2^n+3^n+4^n+5^n)^1/n 计算极限limn^1/2(n^1/n-1) 其中n趋于无穷 极限 limn趋近于正无穷(2^n-3^n)/4^n如何求呀? 由数列极限定义证明limn→无穷 (n^2-2）/（n^2+n+1）=1 极限一道题目limn到无穷根号（n^4-2n+1）/(5n^3+2) 求极限:limn→∞(n-1)^2/(n+1) 求极限limn趋于无穷 1/n^2+2/n^2+...+n-1/n^2+n/n^2 limn→正无穷1+2+3...+(n-1)/n的2次方 极限怎么求啊? limn/n+1的极限怎么求n趋于无穷 求函数极限limn趋于无穷sin(派根号下n^2+1) limn趋近于无穷2·5^n+3^n/5^n+1+2^n+1 limn趋近于无穷(1-2/n)^n limn趋于无穷负2的n次幂加3n次幂除以负2的n+1加3n+1次幂 求极限 求极限limn→∞开n次方(1^n+2^n+…+10^n) 求下列极限limn→∞[n^3(√(n^2+2)-2√(n^2+1)+n)] 求limn→∞（（3^n+2^n)/(3^(n+1)-2^(n+1)））的极限求详解