题型:问答题 简答题 已知{an}是公比为q的等比数列,且a1,a3,a2成等差数列.(Ⅰ)求q的值;(Ⅱ)设{bn}是以2为首项,q为公差的等差数列,其前n项和为Sn,当n≥2时,比较Sn与bn的大小,并说明理由. 查看答案
题型:问答题 简答题 If $2000 a year is invested at the end of each of the next 45 years in a retirement account yielding 8.5 percent, how much will an investor have at retirement 45 years from today()A. $100135.B. $ 277700.C. $ 901060. 查看答案