抛物线y=(n2+n)x2-(2n+1)x+1(n∈N+),交x轴于An,Bn两 发布时间:2017-05-03 08:10 │ 来源:www.tikuol.com 题型:填空题 问题: 抛物线y=(n2+n)x2-(2n+1)x+1(n∈N+),交x轴于An,Bn两点,则|A1B1|+|A2B2|+…+|A2008B2008|的值为____.
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题型:填空题 The _______ scene in the earthquake-stricken area made some people _______ . A.terrifying; terrifiedB.terrifying; terrifyingC.terrified; terrifiedD.terrified; terrifying 查看答案