数列{an}满足a1=1,a2=2,a(n+2)=(1+cos(nπ/2)^2)an+sin(nπ/2)^2,n=1,2
数列an满足a1=1,a2=2,a(n+2)=[1+cos^2(nπ/2)]an+sin^2(nπ/2)],n=1.2.
数列{an}满足a1=1,a2=2,a(n+2)=(1+cos(nπ/2)^2)an+sin(nπ/2)^2,n=1,2
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
设数列{an}满足a1+2a2+3a3+.+nan=n(n+1)(n+2)
设数列{an}满足a1+3a2+3^2a3+.3^n-1×an=n/3,a∈N+.
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:1/a1+2/a2+3/a3+…+n/an=2n
数列an满足a1+2a2+3a3+...+nan=(n+1)(n+2) 求通项an
一直数列{An}满足A1=1/2,A1+A2+…+An=n^2An
整数数列{An}满足 A1*A2+A2*A3+…+A(n-1)*An=(n-1)*n*(n+1)/3 ,(n=2,3,…
已知数列{an}满足a1=1,an=a1 +1/2a2 +1/3a3 … +1/(n-1)a(n-1),(n>1,n∈N
已知数列{an}满足a1=1;an=a1+2a2+3a3+...+(n-1)a(n-1);