Question

Give an example of....
1. A real number that's not a natural number
2. A real number that's not positive or negative
3. An irrational # that's not a real number

Answer 1

1. pi
2. i guess they want 0. but technically i believe it is positive
3. pi*i

Answer 2

Isn't the definition of positive, roughly speaking, "a number \(x\) is positive if \(x>0\)?"

Answer 3

I guess it is considered non-positive by definition