求lim{(n²+n+1)/(2n³?
求lim{(n²+n+1)/(2n³-1)+(n²+n+2)/(2n³-4)+(n²+n+3)/(2n³-9)+……+(n²+n+n)/(2n³-n²)} n→∞
lim{(n² n+1)/(2n³-1) (n²+n+2)/(2n³-4) (n²+n+3)/(2n³-9) …… (n²+n+n)/(2n³-3n 2)}, 设ak=(n^2 n k)/(2n^3-3k 2),则ak, ∴∑ak>na1=n(a^2 n 1)/(2n^3-1)→2, ∑ak
问:有关于极限lim (2^(2n-1)-a 3^(n+1))/(3^(n+1)+a 2^(2n))=1 lim为n→∞ 要详细的过程
答:lim (2^(2n-1)-a 3^(n+1))/(3^(n+1)+a 2^(2n)) =lim[1/2 -3a*(3/4)^n]/lim[3*(3/4)^n(...详情>>
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