Find A intersection B.
A: {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
B: {−2, −1, 1, 4, 7, 11}

{−2, −1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}

{1, 4, 7, 11}

{−2, −1, 1, 2, 3, 4, 5, 6}

{ }

Question

Find A intersection B.
A: {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
B: {−2, −1, 1, 4, 7, 11}

{−2, −1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}

{1, 4, 7, 11}

{−2, −1, 1, 2, 3, 4, 5, 6}

{ }

lgbasallote · Answer

just combine all the elements in A and B

cwrw238 · Answer

??

lgbasallote · Answer

i.e. 

A{3,6,9,12,15,18}
B{4,8,12,16,20}

A U B {3,4,6,8,9,12,15,16,18,20}

lgbasallote · Answer

oh wait..that was union

lgbasallote · Answer

intersection is common elements

cwrw238 · Answer

right

lgbasallote · Answer

i must be drunk today

cwrw238 · Answer

i'm watching you ig   - lol

lgbasallote · Answer

A $\cap$ B (in my example) would be {12} because both A and B have 12

gw2011 · Answer

The intersection is what is common to both.  In this case it is: 1,4,7,11