已知数列an,a1=1,an+1=2/3an+1求an

已知数列{an}满足a1=1,a2=3,an+2=3an+1-2an求an 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 已知数列{an},a1=1,an+1=3an/2an+3,(1)求数列{an}的前五项)(2)数列{an}的通项公式 已知数列{an}满足a1=1/2,an+1=3an+1,求数列{an}通项公式 已知数列{an}中,a1=-1,a2=4,an+2+2an=3an+1 求证：数列{an+1-an}是等比数列,并求{a 数列｛an},a1=1,an+1=2an-n^2+3n,求｛an｝. 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 已知数列an满足a1=1,1/an+1=根号1/an^2+2,an>0,求an 已知数列{an}中,a1=1,an=2an-1+3的n次方,求an 已知数列（an）满足an+1=2an+3×2∧n,a1=2求an 数列an中,a1=3,an+1=an/2an+1,则an=? 已知数列an满足 a1=1/2,an+1=3an/an+3求证1/an为等差数列