How do you find the range of #x^2/(x-5)#?
The range for x is all real number except 5
In a quotient function, the denominator can be an number except 0.
You can get the explanation about why the denominator can't be zero in all around the internet or simply ask your teacher
In the question above, the denominator is
So, the denominator will be 0 only if
Thus it's conclude that only if
The range for
Usually the term is written as