题型:名词解释 已知f(x)=4+1x2,数列{an}的前n项和为Sn,点Pn(an,1an+1)(n∈N*)在曲线y=f(x)上,且a1=1,an>0.(1)求数列{an}的通项公式an;(2)数列{bn}的首项b1=1,前n项和为Tn,且Tn+1an2=Tnan+12+16n2-8n-3,求数列{bn}的通项公式bn. 查看答案
题型:名词解释 -How long does it take you to get to school? -______. [ ]A.5 kilometers B.Every day C.By bike D.Around an hour 查看答案