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首页>高中数学综合库>数列>等差数列>an与Sn的关系——等差数列>由Sn求通项公式

类题推荐

【推荐1】已知数列eqId93e38ecd74a24cb59da79181b95bfd3a的前n项和是eqIdade9ed5fbfb14c4a902c8ff2594d8add.当eqIdf3ccc5889ff44339b4e5a8c578f48e0e________时,eqId93e38ecd74a24cb59da79181b95bfd3a是公差eqIdc5296e5449da414e9242fd4f9e0a4a58________的等差数列.
更新:2019/10/12难度:0.65题型:双空题组卷:97
【推荐2】设数列eqId93e38ecd74a24cb59da79181b95bfd3a的前eqIdf458db68122849abb588feb2e682d9ac项和为eqIddb5481de79c946c0a760143297d5eade,满足eqId0ed42c4c604d4eccb673c05c6b98994a,则eqIdec15b069a63a4c5fb3a6606336bb1b1a______eqIda5cfc86cb41d40718492d2db533c6903______.
更新:2019/11/03难度:0.65题型:双空题组卷:195
【推荐3】已知数列{an}的前n项和为Sn,且满足Sn=2an-4(n∈N*),则an__________;数列{log2an}的前n项和为__________
更新:2018/01/17难度:0.65题型:双空题组卷:275