Question

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

Answer 1

{-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}
{}

Answer 2

@Nnesha could you help plz?

Answer 3

@perl could you please help me?

Answer 4

@phi are you available?

Answer 5

@nincompoop could you please help me?

Answer 6

@Callisto could you please help me?

Answer 7

@iGreen @iambatman could either of you please help me?

Answer 8

@Sandybottoms1432
One secret about math is that a lot of problems can be solved by starting to understand the definitions (and the words that define them).
Here, what can you tell me about intersection of two sets?

Answer 9

They both have 4,7, and 11

Answer 10

In mathematics, the intersection A ∩ B of two sets A and B is the set that contains all elements of A that also belong to B (or equivalently, all elements of B that also belong to A), but no other elements. For explanation of the symbols used in this article, refer to the table of mathematical symbols.

Answer 11

* ref Wiki

Answer 12

it is a #cap I think the upside down u?

Answer 13

Examine your answer {4,7,11}, if it satisfies the definition, then it is the correct answer. If not, do something to make it correct.
Intersection is #cap , or \(\cap\), union is #cup, or \(\cup\) (think of U=union).

Answer 14

Remember that all members of a set are enclosed in a pair of braces \(\{ \}\), and repetition of members are not allowed.
Example: {1,2,3} is a valid set,
{1,1,2,3}, (1,2,3) and [1,2,3], are not valid sets

Answer 15

Okay but what is the definition of an upside down union? I know what a union is but I am unsure what the #cap is?

Answer 16

The definition of intersection \(\cap\) has been given above (ref. Wiki).
The definition of union (\\cup\) is given below:

Math Term Definition. Union of two sets. The union of two sets is everything in both sets. For example if you have the set {3,4,5} and the set {5,6,7}, then the union of these two sets is {3,4,5,6,7}. The symbol for union is a capital U.
(ref. Wiki)

Answer 17

(\\cup\) should read \(\cup
\)

Answer 18

OH!
A: {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
B: {-2, -1, 1, 4, 7, 11}
So that means that it would be 1,4,7,11!

Answer 19

:D

Answer 20

I gets it now :3 You the bestest @mathmate could you help me with one more? I will open another question to give you another medal?

Answer 21

I don't know about choice letters, but
{1,4,7,11} is correct, but remember that 1,4,7,11 is not a set, {1,4,7,11}is.

Answer 22

Yes sorry I forgot the {} :)

Answer 23

Go ahead.
If someone else answers, I will give the other person a chance. If you get stuck, you can always tag me.

Answer 24

Thanks :D