Question

Can someone help me with a question for a fan and medal?

Answer 1

Find B union D.
B: {-3, -1, 3, 4, 9, 11}
D: {numbers divisible by 3 from 1 to 15}

Answer 2

3 and 9.

Answer 3

In principle, Union is like appending elements.
However, note in sets, if the elements are the same, only one counts.

Answer 4

Union, not intersection. @Kash_TheSmartGuy

Answer 5

Okay Kash, but how did you get it?

Answer 6

Wait so is Kash wrong sh3lsh?

Answer 7

B: {-3, -1, 3, 4, 9, 11}
D: {numbers divisible by 3 from 1 to 15}


B: {-3, -1, 3, 4, 9, 11}
D: {3, 6, 9, 12, 15}
B U D: { -3, -1, 4, 11, 3, 6, 9, 12, 15}

B (intersection) D
{3, 9}

Answer 8

So, I was correct!

Answer 9

Does this make sense?
Know that sets are unordered sequences with unique elements.

@Kash_TheSmartGuy , you do understand that you gave the answer B (intersection) D, not B (union) D, right?

Answer 10

Yeah, it does. I'll give Sh3lsh a fan since he explained it and Kash a medal. Thanks guys.

Answer 11

:|

Answer 12

Thank you!

Answer 13

Well I can't give two medals, so thats the most I can give out. Sorry

Answer 14

The response he gave was incorrect.
Write that on a test, and you would receive no credit.

Answer 15

But the question is multiple choice, and {3,9} was one of the answer choices. And you got the same answer too

Answer 16

:|
{3,9} is the INTERSECTION
{ -3, -1, 4, 11, 3, 6, 9, 12, 15} is the UNION

Answer 17

{3, 9}
{-3, -1, 3, 4, 9, 11}
{ }
{-3, -1, 3, 4, 6, 9, 11, 12, 15}


These are the answer choices. You both said {3, 9}.

Answer 18

Find B union D.
B: {-3, -1, 3, 4, 9, 11}
D: {numbers divisible by 3 from 1 to 15}

{3, 9}
{-3, -1, 3, 4, 9, 11}
{ }
{-3, -1, 3, 4, 6, 9, 11, 12, 15}

This is the full question

Answer 19

I think you should review set operations.
One can take the Union of a set.
One can take the Intersection of a set.
(and more, but that's later)
The previous commenter who didn't rectify his mistake found the INTERSECTION of the set.
You asked for the UNION of the set.
I explained how one could find the UNION and INTERSECTION.

https://www.khanacademy.org/math/probability/independent-dependent-probability/basic_set_operations/v/intersection-and-union-of-sets

Answer 20

I'm confused by what you're trying to say. Is the answer {3, 9} or not?

Answer 21

No. But I cannot explain any longer.