已知数列{an}满足a1=2,a(n+1)-an=a(n+1)*an,则a31=?(注:n不是乘n)
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 12:01:39
已知数列{an}满足a1=2,a(n+1)-an=a(n+1)*an,则a31=?(注:n不是乘n)已知数列{an}满足a1=2,a(n+1)-an=a(n+1)*an,则a31=?(注:n不是乘n)
已知数列{an}满足a1=2,a(n+1)-an=a(n+1)*an,则a31=?(注:n不是乘n)
已知数列{an}满足a1=2,a(n+1)-an=a(n+1)*an,则a31=?(注:n不是乘n)
已知数列{an}满足a1=2,a(n+1)-an=a(n+1)*an,则a31=?(注:n不是乘n)
两边同除a(n+1)an,得1/an-1/a(n+1)=1
所以数列{1/an}为首项1/a1=1/2,公差-1的等差数列
1/an=1/2-(n-1)=-n+3/2
1/a31=-59/2
a31=-2/59
已知数列an满足a1=2,an=a(n-1)+2n,(n≥2),求an
已知数列an满足:a1=1,an-a(n-1)=n n大于等于2 求an
已知数列{an}满足a1=33,a(n+1)-an=2n,则an/n的最小值
已知数列{an}满足a1=33,a(n+1)-an=2n,求an/n的最小值
已知数列an满足a1=100,a(n+1)-an=2n,则(an)/n的最小值为
已知数列{an}满足a(n+1)=an+n,a1=1,则an=
已知数列{an}满足a1=2,a(n+1)-an=a(n+1)*an,则a31=?
已知数列{a}满足a1=1/2,a(n+1)=an+1/(n^2+n),求an已知数列{a}满足a1=1/2,a(n+1)=an+1/(n^2+n),求an
已知数列{an}满足a(n+1)=an+3n+2,且a1=2,求an=?
已知数列an满足a(n+1)=an+3n+2,且a1=2,求an
已知数列{an}满足条件a1=3,且a( n+1)-an=(20)^n+n,求通项公式已知数列{an}满足条件a1=3,且a( n+1)-an=(2)^n+n,求通项公式
已知数列an满足条件a1=-2 a(n+1)=2an/(1-an) 则an=
已知数列an满足a1=1,a(n+1)=an/(3an+2),则an=?
已知数列{an}满足条件:a1=5,an=a1+a2+...a(n-1) n大于等于2,求数列{an}的通项公式
已知数列{an}满足a(n+1)=an+lg2,a1=1,求an
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)
已知数列{an}满足a1=a,a2=b,a(n+1)=a(n+2)+an,求a2012
已知数列满足a1=1/2,an+1=2an/(an+1),求a1,a2已知数列满足a1=1/2,a(n+1)=2an/(an+1),求a1,a2;证明0