Question

Find the domain of each of the following real valued function:
f(x)=1/x
f(x)=1/(x-7)
f(x)=(2x+1)/(x^2-9)
f(x)=(x^2+2x+1)/(x^2+8x+12)

Answer 1

1. x ∈ R − { 0 }

2. x ∈ R − { 7 }

3. x ∈ R − { −3, 3 }

4. x ∈ R − { −6, –2 }