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
`(1)/(-2+2)=(1)/(0)` which is undefined, that's the answer

2nd one, gives us -4

3rd gives us -6

4th gives us
`(1)/(√(-2+2))=(1)/(√(0))=(1)/(0)` which is also undefined


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