从lim(n→∞) (1/n)[1/(3 + 1/n) + 1/(3 + 2/n) + ...+ 1/(3 + n/n)] 怎么变为∫(0→1) dx/(3 + x)
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从lim(n→∞)(1/n)[1/(3+1/n)+1/(3+2/n)+...+1/(3+n/n)]怎么变为∫(0→1)dx/(3+x)从lim(n→∞)(1/n)[1/(3+1/n)+1/(3+2/n
从lim(n→∞) (1/n)[1/(3 + 1/n) + 1/(3 + 2/n) + ...+ 1/(3 + n/n)] 怎么变为∫(0→1) dx/(3 + x)
从lim(n→∞) (1/n)[1/(3 + 1/n) + 1/(3 + 2/n) + ...+ 1/(3 + n/n)] 怎么变为∫(0→1) dx/(3 + x)
从lim(n→∞) (1/n)[1/(3 + 1/n) + 1/(3 + 2/n) + ...+ 1/(3 + n/n)] 怎么变为∫(0→1) dx/(3 + x)
见图片,费了很大劲,请采纳.写得很清楚了.
http://hiphotos.baidu.com/qingshi0902/pic/item/15cb0418b3de9c8244497b336c81800a18d84387.jpg
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