a=(9/5)*(a-2)*(a-m)----------(1)

　　a=(9/5)*(1/a-2)*(1/a-m)----------(2)

　　显然有(a-2)*(a-m)=（1/a-2)*(1/a-m)

　　a^2-(2+m)a+2m=(1/a)^2-(2+m)*(1/a)+2m

　　a^2-(1/a)^2-(2+m)a-(2+m)*(1/a)=0

　　(a-1/a)(a+1/a-2-m)=0

　　a=1或-1或a+1/a-2-m=0当a=1或-1时直接代入可得m=14/9或者-32/27

　　当a+1/a-2-m=0时即m=a+1/a-2代入（1）有

　　a=9/5*(a-2)*(a-a-1/a+2)5a=(a-2)*(2-1/a)5a^2=(a-2)(2a-1)

　　13a^2-45a+18=0