十年高考真题分类汇编--数学-专题-数列(共12页).docx

精选优质文档-倾情为你奉上十年高考真题分类汇编（20102019）数学专题08 数列一、选择题1.(2019全国1理T9)记Sn为等差数列an的前n项和.已知S4=0,a5=5,则()A.an=2n-5 B.an=3n-10C.Sn=2n2-8nD.Sn=12n2-2n2.(2019浙江T10)设a,bR,数列an满足a1=a,an+1=an2+b,nN*,则()A.当b=12时,a1010B.当b=14时,a1010C.当b=-2时,a1010D.当b=-4时,a10103.(2018全国1理T4)记Sn为等差数列an的前n项和,若3S3=S2+S4,a1=2,则a5=()A.-12B.-10C.10D.124.(2018浙江T10)已知a1,a2,a3,a4成等比数列,且a1+a2+a3+a4=ln(a1+a2+a3).若a11,则()A.a1a3,a2a3,a2a4 C.a1a4