Question

If C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and D = {numbers divisible by 3 from 1 to 21}, what is C ∩ D?

Answer 1

@skullpatrol little help please

Answer 2

C intersect D is all the elements that C and D share.

Answer 3

{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 18, 21}

{3, 6, 9, 12, 15, 18, 21}

{3, 6, 9}

{ }

these are the answers

Answer 4

So if we look at D, we have the set
D = {3,6,9,12,15,18,21}

and we look at C.
C = {1,2,3,4,5,6,7,8,9,10}

what elements do they have in common?

Answer 5

3,6,9

Answer 6

thanks