Question

Express the following in roster form:
Set M is the set of natural numbers between fourteen and nineteen.

Answer 1

I don't have a clue what you mean by "roster form", never heard that expression.

Usually N is used to describe the set of natural numbers.

I would write your set as
{x | 14 < x < 19, x ∈ N}

Answer 2

yea i was stuck on this one too....thank you though