Select all true statements (using the conventions in this class):
1. Z is the set of integers, {..., -2, -1, 0, 1, 2...}.
2. N is the set of natural numbers, {0, 1, 2,...}.
3. dx means d = kx for some k E Z.
4. dx means d = kx for some k E N.
5. dx means x = kd for some k E Z.
6. 2 is prime.
7. -2 is prime.
8. ALL natural numbers that are divisible by only 1 and itself are prime.
9. A number is odd if and only if 2k + 1 = x for k E Z.
Are these answers correct and if not, why?
Select all true statements (using the conventions in this class):
1. Z is the set of integers, {-2, -1, 0, 1, 2}.
2. N is the set of natural numbers, {0, 1, 2}.
3. dx means d = kx for some k E Z.
4. dx means d = kx for some k E N.
5. dx means x = kd for some k E Z.
6. 2 is prime.
7. -2 is prime.
8. ALL natural numbers that are divisible by only 1 and itself are prime.
9. A number is odd if and only if 2k + 1 = x for k E Z.