Quiz 2

Question 1

A set A⊆B is dense in B

Answer 1

For every two real numbers a and b with a<b, there exists a rational number r satisfying a<r<b

Question 2

A set A is countable

Answer 2

Set A is countable if N~A

Question 3

A set B is uncountable

Answer 3

Set a cannot be counted

Question 4

The ε-δ definition of a sequence converging to point c