Question

What real number is NOT an element of the domain of y = 2/x-5?

Answer 1

so just remember that 0 can never be in the denominator
so you can't have 2/0
therefore x = 0 is not an element of the domain

Answer 2

however, if you meant 2/(x-5), same thinking, x-5 cannot be 0, so x cannot be 5

Answer 3

thanks :)

Answer 4

you're welcome!