Question

find the domain of the function and express the answer in interval notation
1. f(x)=3x-1
2.g(x)=√(x+5)
3.f(x)=16x/(x^2+9)
4.g(x)=13x2-5x+9
5.f(x)=6/(x-5)

Answer 1

1. (-INF, INF)
2. [-5, INF)
3. (-INF,INF)
4. (-INF, INF)
5. (-INF,INF) x not equal to 5

Answer 2

1. f(x)=3x-1 , (-infinity,+infinity)===
2.g(x)=√(x+5) , [-5,+infinity)===
3.f(x)=16x/(x^2+9) , (-infinity,+infinity)===

4.g(x)=13x2-5x+9, (-infinity,+infinity)===

5.f(x)=6/(x-5), (-infinity,+5)U(5,+infinity)===