f[g(x)]=4-x,f(x)=5x/(x-3),求g(x)

热心网友

解：由f(x)=5x/(x-3),可得f[g(x)]=5g(x)/[g(x)-3]=4-x由此可得：g(x)=3(x-4)/(x+1)

热心网友

f[g(x)]=4-x,f(x)=5x/(x-3),求g(x) 解：g(x)=3(x-4)/(x+1)