the big "no-no" in math is division by zero.
so the domain would be all values of x except the number which would make the denominator zero.
So tell me what you would state as the domain.
what is the domain for f(x)
f(x)= x/(x+2)
4 answers
Well, x cannot be -2, can it?
so x can be everything except -2 because -2+2=0
correct.