已知数列{an}满足:an=log n+1(n+2)(n∈N+),定义使a1a2a3…ak为整数的数k(k∈N+)叫做幸
已知数列{an}满足:an=log(n+1)(n+2),n∈N+,我们把使a1•a2•a3•…•ak为整数的数k(k∈N
已知数列an满足an=log(n+1)(n+2),n∈ N:,我们把使a1·a2·…·ak为整数的数k叫做数列的理想数,
已知数列an满足an=log(n+1)(n+2),n∈ N:,我们把使a1·a2·…·ak为整数的数k叫希望数,则区间【
已知数列an满足an=log(n+1)(n+2),n∈ N:,我们把使a1·a2·…·ak为整数的数k叫理想数;
已知数列{an}(n∈N*)满足:an=logn+1(n+2)(n∈N*),定义使a1·a2·a3·……ak为整数的数k
已知数列{an}(n∈N*)满足:an=logn+1(n+2)(n∈N*),定义使a1·a2·a3·……ak为整数的数k
an=log(n+1)(n+2),定义使a1a2...ak为整数的k叫企盼数,求(1,10000)内的k的和
an=log(n+1)(n+2),定义使a1a2...ak为整数的k叫企盼数,求(1,2009)内的k的和
给定an=log(n+2),n属于N+,定义使a1*a2*...ak为整数的k,k属于N+,叫企盼数.
给定an=log(n+1)^(n+2)(n∈N*),给定乘积a1*a2*...*ak为整数叫做“理想数",则区间[1,2
数列{an}的通项公式an=log以(n+1)为底(n+2),定义使乘积ai=a1*a2*a3.*ak为整数的k
已知数列{an}满足ak+a(n-k)=2,(k,n-k∈N*),则数列{an}的前n项和Sn=