A1=1,A(n+1)/An=(n+2)/n,求An?
来源:学生作业帮助网 编辑:六六作业网 时间:2025/02/03 13:58:44
A1=1,A(n+1)/An=(n+2)/n,求An?A1=1,A(n+1)/An=(n+2)/n,求An?A1=1,A(n+1)/An=(n+2)/n,求An?A(n+1)/An=(n+2)/nAn
A1=1,A(n+1)/An=(n+2)/n,求An?
A1=1,A(n+1)/An=(n+2)/n,求An?
A1=1,A(n+1)/An=(n+2)/n,求An?
A(n+1)/An=(n+2)/n
An/A(n-1)=(n+1)/(n-1)
A(n-1)/A(n-2)=n/(n-2)
.
A3/A2=4/2
A2/A1=3/1
把所有式子的左边相乘,右边相乘,等式仍成立.
得到A(n+1)/A1=【(n+2)(n+1)】/(2*1)
即A(n+1)=【(n+2)(n+1)】/2 ①
又因为题目中有A(n+1)/An=(n+2)/n ②
①,②,结合得到:
An=【n*(n+1)】/2
a1=1,a(n+1)=2an+n^2+2n +2 求an
A1=1,A(n+1)/An=(n+2)/n,求An?
已知a1=2 a(n+1)=2an+2^n+3^n 求an
数列{an},a1=3,an*a(n+1)=(1/2)^n,求an
数列{an}满足a1=2,a(n+1)=2an+n+2,求an
已知数列{an}中,a(n+1)=an+2^n,a1=3,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a1=3,a(n+1)=(3n-1)/(3n+2)an(n≥1),求an
{An}中,A1=1,An=A(n-1)+2n,(n>=2)求{An}通项
an中,a1=2,a(n+1)=3an+3(n+1)次方-2n次方,求an
数列{an}中,a1=2,a(n+1)=an(n+1)/n,求{an}通项式
已知数列an满足:a1=1,an-a(n-1)=n n大于等于2 求an
在数列{an}中,a1=2,an除以a(n-1)=n除以n+1,求an
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=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
在数列{an}中,a1=15,3a(n+1)=3an-2,n属于N*,若an
已知数列{An}中a1=1.且A(n+1)=6n*2^n-An.求通项公试An