A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Cookie_2046

  • one year ago

What is the union of the two sets A={1,5,8,12,17} and B= {5,17}? A. {1,5,17} B. {1,5,8,12,17} C. {5,14} D. {17}

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Do you know what union means?

  2. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    The union of two sets is a set that contains every element that is in one set or in the other set. Write each element only once. Now look at your sets. Create a new set, and start filling it with every element you see in set A or in set B. Do not write an element more than once.

  3. Cookie_2046
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    d?

  4. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1440194889262:dw|

  5. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    The union has all elements from BOTH sets. You did the intersection. The intersection has the elements that are in common. The union has all of them.

  6. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    The figure above shows how you start writing the union of the sets. Start by creating a new set and copying all elements from one of the sets. The union already has all elements of set A.

  7. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Now look at the elements of set B. If they are different, write them in the union also. If they are already int he union, don't write them again.

  8. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1440195123845:dw|

  9. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    The two elements of set B are already in the new union set we started writing, so the union set is done. We can close the bracket and we have finished.

  10. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1440195191470:dw|

  11. Cookie_2046
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so is b the answer?

  12. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Exactly.

  13. Cookie_2046
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh Okay thanks for the big help

  14. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Since both elements of set B are also elements of set A, set B does not add any new elements to the union of the sets.

  15. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    You're welcome.

  16. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.