Pre-calc
which of the following functions have only one point that is not in the domain? select all that apply

the second choice, and the last choice are correct.

the first one, x can be any number.
the second one, x can be any number but not -1(the denominator cannot be 0)
the third one, x has to be ≥ 1/2, because 2x-1 cannot be negative.
the fourth one, x can be any number but not -1 or -4
the last one, x can be any number but not -3

6xy and -16xy000000000