interval notation

Question

use interval notation to indicate the domain of f(x)

 

f(x)= x-4/ x^2-7x-8

Answer 1

 f(x) =  ( X -4 ) / (X² -7x - 8) = ( X - 4 ) / ( X - 8 ) ( X + 1)

 

   Domain:

                   X ε ( - ∞, -1) U X ε( -1, 8) u xε ( 8 ,+∞)