..已知数列an中,an+1/3an=2的n次方(n+1为脚标)a1=1 an=?
1个回答
a(n+1)/(3an)=2
a(n+1)/an = 6
an/a1 =6^(n-1)
an = 6^(n-1)
相关问题
1.已知数列{an} 满足:a1=4,an=3an-1(n-1是脚标)-2,求an(n为脚标)-------------
已知数列{an}中,a1=1,an=2an-1+3的n次方,求an
已知数列an中,a1=2,an+1-an=3的n次方,求an
已知数列{an}满足a1=1,an=3的n-1次方+an-1(n≥2)!
已知数列{an}满足:a1=2,an+1=3an+3的n+1次方-2的n次方(n∈N+)
已知数列an满足a1=1,an=(3)的n次方-1+an-1求证an=3n-1/2
已知数列{an}满足a1=2,an+1=3an+3的n+1次方-2的n次方
已知数列an满足a1=1,an=3的n次方+2an-1
已知数列{an}满足a1=1,且an=2an-1+2的n次方(n≧2且n∈N)(1)求证数列{an/2的n次方}
已知数列{an}中,a1=3,an+1+an=3•2n,n∈N*.