指数函数y=g(x)满足,g(2)=4 => y=g(x)=2^xf(x)=[-g(x)+n]/[2g(x)+m] => f(0)=[-1+n]/[2+m] ,f(1)=[-2+n]/[4+m],f(-1)=[-1/2+n]/[1+m]f(x)是奇函数 => f(1) = -f(-1),f(0)=0 =>m=2,n=1