优优班--学霸训练营 > 题目详情
  • 在公差不为零的等差数列\(\{a_{n}\}\)中,已知\(a_{1}=1\),且\(a_{1}\),\(a_{2}\),\(a_{5}\)依次成等比数列\(.\)数列\(\{b_{n}\}\)满足\(b_{n+1}=2b_{n}-1\),且\(b_{1}=3\).
    \((1)\)求数列\(\{a_{n}\}\),\(\{b_{n}\}\)的通项公式;
    \((2)\)求数列\(\{a_{n}(b_{n}-1)\}\)的前\(n\)项和为\(S_{n}\).
    【考点】等差数列的通项公式,等差数列与等比数列的综合应用
    【分析】请登陆后查看
    【解答】请登陆后查看
    难度:较易
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