求极限lim(n→∞)(2/n^2+…+2n/n^2)n趋近于无穷,2/n^2+…+2n/n^2的极限
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求极限lim(n→∞)(2/n^2+…+2n/n^2)n趋近于无穷,2/n^2+…+2n/n^2的极限
求极限lim(n→∞)(2/n^2+…+2n/n^2)
n趋近于无穷,2/n^2+…+2n/n^2的极限
求极限lim(n→∞)(2/n^2+…+2n/n^2)n趋近于无穷,2/n^2+…+2n/n^2的极限
=2*(1+n)*n/2/n^2=(n^2+1)/n^2;
极限时1
oi
2/n^2+…+2n/n^2
=(2+3+4…+2n)/n^2
=(2+2n)(2n-2)/2n^2
=2(n^2-1)/n
=2-(2/n^2)
故而lim=2
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