1.分离常数法y=(ax+b)/(cx+d)=(cx*a/c+ad/c-ad/c+b)/(cx+d)=((cx+d)*a/c+b-ad/c)/(cx+d)=a/c+(b-ad/c)/(cx+d)若b=ad/c 则函数值恒为：a/c若b不等于ad/c,由于分式分母不能取0,则值域为（-∞,a/c）∪（a/c,+∞）2.反函...