What is the domain and range of 5/-1-x?

Answer 1

Given f(x) = 5 /(-1-x) --> -5/(1+x)

x is not allowed to be -1

Domain : x∈ℜ except x ≠ -1

Range : y∈ℜ

Answer 2

You mean y = -5/(-1-x)

otherwise, the function is -5-x and the domain is all reals.

-1-x = 0 ---> -1 = x

So the domain is any real number EXCEPT -1

(-infinity,-1) U (-1,infinity)

real number line with open circle at -1