Question

If A = {1, 2, 3, 4, 5, 6, 7, 8, 9} and B = {3, 6, 9, 12, 15, 18}, what is A B?

{3, 6, 9}

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

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

{ }

Answer 1

@tacamry What's the symbol between A and B?
"what is A B? "

Answer 2

proper notations dont have a duplication of elements; so C aint it

Answer 3

If its A U B= (1,2,3,4,5,6,7,8,9 ,12 ,15, 18)
A intersect B = (3,6,9)