数列满足a1+a2+……+an=2n^2-3n+1 ,求a4+a5+a6+.+an

数列an满足a1=1/2,a1+a2+a3……an=n^2an,则an 已知数列{an}中满足a1=1,a(n+1)=2an+1 (n∈N*),证明a1/a2+a2/a3+…+an/a(n+1) 已知数列{An}满足A1=0.5,A1+A2+…+An=n^2An(n∈N*),试用数学归纳法证明:An=1/n(n+1) 数列{An}满足a1=1/2,a1+a2+..+an=n方an,求an 已知数列{an}满足a1+2a2+3a3+…+nan=n(n+1)(n+2),则a1+a2+a3+…+an=多少? 已知数列{an}满足a1=1/2,a1+a2+……+an=n^2an,用数学归纳法证明an=1/{n(n+1)} (1)数列{an}中,a1=1,a2=-3,a(n+1)=an+a(n+2),则a2005=____(2)已知数列｛an｝满足a1=1,a1×a2×a3…an=n^2,求an. 一直数列{An}满足A1=1/2,A1+A2+…+An=n^2An用数学归纳法证明An=1/[n(n+1)] 数列满足a1+a2+……+an=2n^2-3n+1 ,求a4+a5+a6+.+an 已知数列{an}满足a1=1,an=a1+2a2+3a3+……+(n-1)an-1 (n≥2)求an=? 数列{an}满足:a1+3a2+5a3+…+(2n-1)an=(n-1)3^n+1+3,则数列{an}的通项公式为 数列{an}满足:a1+3a2+5a3+…+(2n-1)an=(n-1)3^n+1+3,则数列{an}的通项公式为 已知数列an满足a1+2a2+3a3+……+nan=2^n,求an 若数列｛an｝满足a1=1,an+1=2an,n=1,2,3,……,则a1+a2+……+an=____________ 若数列{an}满足a1×a2×a3…an=n²+3n+2,求数列{an}的通项公式 数列{an}满足(a1/1)+(a2/3)+(a3/5)+…+[an/(2n-1)]=3^(n+1),则数列{an}的通项公式为? 数列{an}满足a1/1+a2/3+a3/5+…+an/(2n-1)=3^(n+1)则数列{an}的通项公式为? 若数列｛an｝满足：a1=1,an+1=2an,n=1,2,3….则a1+a2+…+an=______.