Question

Which function's domain consists of all real numbers except -2?

Answer 1

Domain is the numbers you can use for x

so if the domain is all real numbers except -2, then subsituting -2 for x will result in an undefined like division by 0 or square root of a negative


subsituting it into the first one give us $\frac{1}{-2+2}=\frac{1}{0}$ which is undefined, that's the answer

2nd one, gives us -4

3rd gives us -6

4th gives us $\frac{1}{\sqrt{-2+2}}=\frac{1}{\sqrt{0}}=\frac{1}{0}$ which is also undefined


well, 2 possible answers, none are the best, they are both undefined