Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

niikofi12

  • one year ago

what duz it mean to say "(a+b) is composite"?

  • This Question is Open
  1. kirbykirby
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    It just means it is not prime, meaning there is a divisor that is not just 1 and itself

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

    For example, 2, 3, 5, 7, 11 are prime but 4, 6, 15, 21 are composite (2*2=4, 2*3=6, 3*5=15, 7*3=21)

  3. niikofi12
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks! u r d best!

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

    :) np

  5. niikofi12
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    one mor fn...if u hv X={1,2,3,...,10} n aRb( a relates b) such dat (a+b) is composite. wat r the elements of the relation?

  6. niikofi12
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is it (1,3),(1,5),(1,7),(1,8),...?

  7. niikofi12
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @kirbykirby?

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

    yes it would be any pair (a,b) such that adding both together "a+b" gives a composite number Although I'm not too sure if the sum can't be greater than 10. I never saw this "Rb" notation. Does it say anywhere that (a+b) belongs to X ?

  9. niikofi12
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i think so cuz it says "... and R a relation on X defined by aRb:a+b is composite"

  10. niikofi12
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cuz X is limited on d range 1-10

  11. niikofi12
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wat do u fnk?

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

    ok then I would think that the sum can't exceed 10 (but I am not 100% sure o_o)

  13. niikofi12
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    me neither. thanks anyway

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

    but fairly certain. Otherwise I think you'd have too many pairs to list lol

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

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.