数列〔an〕满足an+1+an=4n-3,当a1=2时,求数列〔an〕前n项和

数列〔an〕满足an+1+an=4n-3,当a1=2时,求数列〔an〕前n项和 已知数列｛an｝满足a1=4/3,且an+1=4（n+1）an/3an+n 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 已知数列｛an｝满足a1=4/3,且an+1=〔4(n+1)an〕/(3an+n) (n∈N*)已知数列｛an｝满足a1=4/3,且an+1=〔4(n+1)an〕/(3an+n)(n∈N*).（1）求1/a1+2/a2+…+n/an的值；（2）求证：a1+a2/2+a3/3+…+an/n≤ n+ 7/12-(1/4)^n 已知数列{an}满足a1=4,3an=5an(n下-1) +1,求an 数列an满足,a1=1/4,a2=3/4,an+1=2an-an-1(n≥2,n属于N*),数列bn满足b1 数列{an)满足an=4a(n-1)+3,a1=0,求数列{an}的通项公式 数列an满足a1=1/3,Sn=n(2n-1)an,求an 数列〔an〕满足an+1+an=4n-3,当a1=2时,Sn为数列〔an〕前n项和,求S 2n+1 已知数列{an}满足,a1=2,a(n+1)=3根号an,求通项an数列{an}满足:an>0,且根号下Sn=an+1/4,求通项an 数列{an}满足a1=1 an+1=2n+1an/an+2n 数列[An]满足a1=2,a（n+1）=3an-2 求an 已知数列an满足a1=4,an=n+1/n-1乘以an-1则an= 已知数列{an}满足a1=-1,an=[(3n+3)an+4n+6]/n,求数列an的通向公式.已知数列{an}满足a1=-1,an=[(3n+3)an+4n+6]/n,bn=3^(n-1)/an+2.求数列an的通向公式.第一遍打错了。是下面这个。an+1=[(3n+3)an+4n+6]/n,bn=3^(n-1)/an+2 数列{an}满足a1=1,an=3n+2an-1(n≥2)求an 已知数列{an}满足a1=1,an=(an-1)/3an-1+1,(n>=2,n属于N*),求数列{an}的通项公式 已知数列{an}满足a1=1 an+1=an/(3an+1) 则球an 已知数列{an}满足an+1=an+n,a1等于1,则an=?