SOLUTION: I have 2 problems that sort of come together. My first is f(x)=ln(-x) When i input this into my ti83+ an error comes up saying nonreal ans.I have done f(x)=ln x (first part of p

Algebra ->  Graphs -> SOLUTION: I have 2 problems that sort of come together. My first is f(x)=ln(-x) When i input this into my ti83+ an error comes up saying nonreal ans.I have done f(x)=ln x (first part of p      Log On


   



Question 52757: I have 2 problems that sort of come together. My first is f(x)=ln(-x)
When i input this into my ti83+ an error comes up saying nonreal ans.I have done f(x)=ln x (first part of problem i'm working)
my second problem is f(x)=sqrt(-x) ( i have done f(x)=sqrt x

Answer by rchill(405) About Me  (Show Source):
You can put this solution on YOUR website!
You're getting non-real answer because log and square root of a negative number is undefined. That is unless you use complex/imaginary numbers.