Question

I need to know what is the domain of the function please help as soon as possible

Answer 1

The domain is the possible values of x. 

There are no real values for ln 0 or ln of a negative number so the value of (1 - x) must be > 0 

1 - x > 0 
-x > -1
x < 1

Domain is x < 1 or in interval notation it is ( -∞, 1)