卷临天下 全国100所名校最新高考模拟示范卷理综五答案

卷临天下 全国100所名校最新高考模拟示范卷理综五答案 ，目前答案易对网已经整理了卷临天下 全国100所名校最新高考模拟示范卷理综五答案 的各科答案和试卷，更多联考试卷请关注本网站。

1.:()设数列(S)的公差为d则d==§3=2.…1分从而S1=S-4d=1,……………………………………………………………………2分所以S.=1 2(n-1)-2n-1.……3分当n≥2时,a.=S,-S,1-24分又a=S5分故{a、}的通项公式为an…6分(2)当n≥2时,T=2 2×2 2×2 … 2×2-(1 3 … 2n-1)…………8分=2 2X2-2×2-( 2n=1=2-n-6.…………………10分又7-1也满足T=22-n-6,…………………………………………11分故T=22-n2-6.……………………………………………………………12分

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