Question

f(x)=4+ln(2x-4)的反函数等于多少?怎样算的呢.

Answer 1

f(x)=4+ln(2x-4)

x = 4 + ln(2y-4)

x-4 = ln(2y-4)

e^(x-4) = 2y - 4

反函数 y = (1/2)e^(x-4) +2