y=2x-5/x-1(x属于R,且x≠1)的反函数怎么求
问题描述:
y=2x-5/x-1(x属于R,且x≠1)的反函数怎么求
答
化分母,y=[2(x-1)-3]/(x-1)
y=2-[3/(x-1)]
3/(x-1)=2-y
x-1= 3/2-y
x=3/2-y + 1
x=(5-y)/(2-y)