Tell whether the each statement is sometimes, always or never true

Question

1) If n is zero then x^-n is 1
2) If n is negative integer then x^-n=1
3) If x is zero then x^-n is 1
4) If n is an integer then x^-n>1

Answer 1

1 sometimes 0^0 is undefined
2 never
3 never
4 sometimes .3^1 < 1

Answer 2

Tell whether the statement is always, sometimes or never true.
Nine Students choose integers. seven of them are -16, 12, -13, -6, -5, 6 an 1