数列{an}满足a1+2a2+2^2a3+.+2^n-1an=n/2(n属于正整数),
数列{an}满足a1+2a2+2^2a3+.+2^n-1an=n/2(n属于正整数),
设数列{An}满足A1+3A2+3^2*A3+...+3^(n-1)*An=n/3,a属于正整数.
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+3a3+...+nan=(2n-1)*3^n(n属于正整数)求数列{an}得通项公式
设数列{an}满足a1+3*a2+3^2*a3+......+3^(n-1)*an=3/n,n属于正整数。 (1)求数列
数列{an}满足an=2an-1+2^n+1(n为正整数,n≥2),a3=27 (1)求a1,a2的值
数列{an}中,a1*a2*a3...*an=n^2(n属于正整数),则a3+a5的值为
已知数列{an}满足a1+a2+a3+...+an=n^2+2n.(1)求a1,a2,a3,a4
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
设数列{an}满足a1+2a2+3a3+.+nan=n(n+1)(n+2)
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