职教组卷基于海量职教高考试题库建立的在线组卷及学习系统
职教组卷
  • 题型:选择题 题类:期中考试 难易度:难

    若\(\left\{ {{a}_{n}} \right\}\)是等比数列,前\(n\)项和\({{S}_{n}}={{2}^{n}}-1\),则\(a_{1}^{2}+a_{2}^{2}+a_{3}^{2}+\cdots +a_{n}^{2}=\)(    )

    A. \({{({{2}^{n}}-1)}^{2}}^{\;\;\;\;\;\;\;\;}\) B. \(\dfrac{1}{3}{{({{2}^{n}}-1)}^{2}}\) C. \({{4}^{n}}-1\) D. \(\dfrac{1}{3}({{4}^{n}}-1)\)
  • 相关试卷