【单选题】已知数列{a n }的通项公式是 a n = 3n+1(n奇数) 2n-2(n为偶数) ,则a 2 a 3 等于( )
【简答题】● NAC’s(Network Access Control ) role is to restrict network access to only compliant endpoints and (71) users. However, NAC is not a complete LAN (72) solution additional proactive and (73) security ...
【单选题】编写C/C++高级语言程序一般需要经过的步骤依次是________。
【单选题】已知等差数列{a n }的前三项依次为a-1,a+1,2a+3,则此数列的通项公式a n 等于( )
【单选题】已知等差数列{a n }的前三项依次为a-1,a+1,2a+3,则此数列的通项公式a n 等于 [ ]
【简答题】已知数列 { }的通项公式为 a n =(-1) -n (2n-1) ,则 等于( )