(1)A(n+2)=(5/3)*A(n+1)-(2/3)*A(n)
3A(n+2)=5A(n+1)-2*A(n)
3A(n+2)-3A(n+1)=2A(n+1)-2A(n)
3[A(n+2)-A(n+1)]=2[A(n+1)-A(n)]
[A(n+2)-A(n+1)]/[A(n+1)-A(n)]=2/3
即B(n+1)/B(n) =2/3
B(n)是等比数列
B1=A2-A1=5/3-1=2/3
B(n)是首项为2/3,公比为2/3的等比数列
B(n)=(2/3)^n
(1)A(n+2)=(5/3)*A(n+1)-(2/3)*A(n)
3A(n+2)=5A(n+1)-2*A(n)
3A(n+2)-3A(n+1)=2A(n+1)-2A(n)
3[A(n+2)-A(n+1)]=2[A(n+1)-A(n)]
[A(n+2)-A(n+1)]/[A(n+1)-A(n)]=2/3
即B(n+1)/B(n) =2/3
B(n)是等比数列
B1=A2-A1=5/3-1=2/3
B(n)是首项为2/3,公比为2/3的等比数列
B(n)=(2/3)^n