Question

write each set in roster form and in set-builder notation

R is the set of even natural numbers that are less than 2

Answer 1

there are no even natural numbers less than 2, unless you call 0 natural which most do not.
so
{} is the set builder notation

Answer 2

roster
\[\{n\in N\space| \space n<2\}\\r\\\{n|n<2,n\in N\}\]

Answer 3

that should say or*

Answer 4

@danielbarrios understand?

Answer 5

0 is a natural number?

Answer 6

or no

Answer 7

no

Answer 8

some argue that it is, but its not...

Answer 9

so you are dealing with the empty set

Answer 10

thanks

Answer 11

np

Answer 12

{n|n<2,n in N} is still empty, but now we can see why. If we just used {} we would not know why it is empty...this is one way of thinking about it.