2022-2023学年高三一轮复习摸底测试卷语文一衡水金卷先享题

2022-2023学年高三一轮复习摸底测试卷语文一衡水金卷先享题,收集并整理关于2022-2023学年高三一轮复习摸底测试卷语文一衡水金卷先享题得系列试卷及其答案，查看更多衡水金卷先享题摸底卷完整的试卷及其答案请关注WX公众号：趣找答案

1、2022-2023学年高三一轮复习摸底测试卷语文一衡水金卷先享题

2、衡水金卷先享题2022-2023高三一轮复习摸底测试卷理数(二)答案

3、衡水金卷先享题2022-2023高三一轮摸底卷语文三

17.解:(1)设等差数列{an}的公差为d由题意得a1+d+a1+5d=18,mn(2a1+6d=181a1+3d+a1+9d=30,(2a1+124=30解得3(2分)d=2所以an=2n+1(3分)又由题意得b1=a1-1=2,b2=a2-1=4,b3=a41=8所以{bn}是首项为2,公比为2的等比数列,所以b,=2n.(6分)7(2)由(1)可知c(8分)b所以Sn=c1+c2+c3+…+c所以S,52n-12n+1+①-②得,2S,=2+2×(2+2+…+17n+1(1+-十一,+…22n-+1212n_2n+52n+5所以Sn=5(12分

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