Question

What is the domain of f?

Answer 1

When we ask you the domain of f, you need to search for a forbidden value ?

for example you can't divide by zero, so assume x was equal to seven.

Then you would have f(7) = 7 / 7-7 = 7 / 0 this would be impossible because you can't divide by zero, yes ?

Other than that everything works, so the answer is c : all real values of x such that x ≠ 7

Good Luck