已知数列{an}满足:a1+8/7*a2+(8/7)²*a3+...(8/7)^(n-1)an=n(n+1),
设数列{an}满足a1+3a2+3²a3+...+3^(n-1)an=n/3,n∈N+*.(1)求数列{an}
已知数列{an}满足a1=4,an+1=an+p.3^n+1(n属于N+,P为常数),a1,a2+6,a3成等差数列.
已知数列{an}满足:a1=1,且an-a(n-1)=2n.求a2,a3,a4.求数列{an}通项an
数列{an}满足a1+2a2+2^2a3+.+2^n-1an=n/2(n属于正整数),
已知数列{an}和{bn}满足关系式:bn=a1+a2+a3+...+an/n(n属于N*) (1)若bn=n^2,求数
已知数列{an}满足a1+a2+a3+...+an=n^2+2n.(1)求a1,a2,a3,a4
已知数列an满足1/a1+2/a2+……+n/an=3/8(3∧2n-1),n属于正整数1.求an
已知数列{an}和{bn}满足关系式bn=a1+a2+a3...an\n (n属于N*)
已知数列{an}满足:a1=20,a2=7,an+2-an=-2(n∈N*).
设数列{An}满足A1+3A2+3²A3+******+3^(n-1)An=n/3
已知:数列{an }满足a1+2a2+2^2·a3+``````+2^n-1·an=n/2(n属于正整数)
已知数列an满足a1+2a2+22a3+…+2n-1an=n2(n∈N*).