Y=根号下X-根号下(X-1)的反函数怎么求
问题描述:
Y=根号下X-根号下(X-1)的反函数怎么求
答
Y=根号X-根号(X-1)
1/Y = 1/(根号X - 根号(X-1) )
= 根号X + 根号(X-1)
相加.
Y+1/Y = 2根号X
(Y+1/Y)/2 = 根号X
X = (Y+1/Y)^2/4.