Y=4X+1/5X-3,求反函数?
问题描述:
Y=4X+1/5X-3,求反函数?
答
Y=(4X+1)/(5X-3)
5yx-3y=4x+1
(5y-4)x=3y+1
x=(3y+1)/(5y-4)
所以反函数为
y=(3x+1)/(5x-4)(x≠4/5)