如下 设递增数列{an}满足a1=1,4an+1=5an+√9an^2+16（n∈N+）设递增数列{an}满足a1=1,4an+1=5an+√9an^2+16（n∈N+）(1)求数列{an}的通项公式(2)证明：1/a1+1/a2+1/a3+……+1/an

如下 设递增数列{an}满足a1=1,4an+1=5an+√9an^2+16（n∈N+）设递增数列{an}满足a1=1,4an+1=5an+√9an^2+16（n∈N+）(1)求数列{an}的通项公式(2)证明：1/a1+1/a2+1/a3+……+1/an 设{an}是a1=4的单调递增数列,且满足an+1^2+an^2+16=8（an+1+an）+2an+1an,求ann+1均为a的下标 设数列{an}满足a1=1, an=(4an-1 +2)/(2an-1 +7) ,则通项xn=? 已知递增的等差数列{an},满足a1=1,且a1,a2,a5成等比数列1.求等差数列{an},的通项an2.设bn=an+2^an,求数列｛bn｝的前n项Sn 已知数列(an)满足a1>0,(an+1)/an=1/2（n为正整数）,则数列｛an｝是____数列（递增或递减 设数列{an}满足lg(1+a1+a2+...+an)=n+1,求通项公式an 已知递增数列{an}满足a1=1,(2an+1)=an+(an+2),且a1,a2,a4成等比数列.求an 递增等差数列an满足a1=1,a1,a2,a3为等比数列.设bn=an+2的an次方,求数列bn的前n向和sn 已知数列an满足a1=1,an+1/an=-1,则数列是?递减还是递增还是摆动还是常数列. 已知递增数列{an}的前n项和为Sn,且满足a1=1,4Sn-4n+1=an2.设bn=1求详解,感激不尽. 设数列AN满足A1等于1,3(A1+a2+~+AN)=(n+2)an,求通向公式 递增数列{an}满足a1=6,an+an-1=9/an-an-1+8(n>=2)则a70= 设函数f(x)=根号下x2+4,若一个正数数列{an}满足:a1=1,an+1=f(an),求数列的通项公 关于数列、等差数列的题目设数列an满足an+1=an-2且a1=241）判断an是什么数列2）若an 若数列{an}满足a1>0,且a(n+1)=(n/n+1)乘以an,则数列{an}是 递增数列,递减数列 常数列 摆动数列求详解 设数列｛An｝满足 A1=6,A2=4 A3=3,且数列{An+1-An}（n属于自然数）是等差数列,球An的通向公式 rt设数列｛An｝满足 A1=6,A2=4 A3=3,且数列{An+1-An}（n属于自然数）是等比数列,球An的通向公式rt 数列an满足a1=2,an+1=4an+9,则an=? 数列证明题一题设数列{An}满足：A1=1,且当n∈N*时,An^3+An^2×[1－A(n+1)]+1=A(n+1）求证：数列{An}是递增数列.