Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Gabylovesyou Group Title

Let A = {circle, square} and let B = {3, 4, 5}. Find A X B. {circle, square, 3, 4, 5} { } {3, 4, 5} {(circle, 3), (circle, 4), (circle, 5), (square, 3), (square, 4), (square, 5)} Question 21 (Multiple Choice Worth 1 points) [3.06] If f(x) = x^2 - 1, find f(3). 5 2 8 -2

  • one year ago
  • one year ago

  • This Question is Closed
  1. Gabylovesyou Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @AccessDenied @baldymcgee6

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

    1) A x B means the set of all ordered pairs whose first entry is an eement of A and second is an element of B. So, you'll have a set looking something like \(\{(a_1, b_2), \ (a_2, b_2)\}\) etc.

    • one year ago
  3. baldymcgee6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    f(x) = x^2 - 1, find f(3) f(3) = (3)^2 -1 f(3) = 9-1 f(3) = 8

    • one year ago
  4. Gabylovesyou Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    for the first one is it A?

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

    No, A) would simply be the union of the sets. This is represented as "A u B." A x B will have ordered pairs as elements of the set, rather than single items from each set.

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

    it has to be B or C right?

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

    It would be D): {(circle, 3), (circle, 4), (circle, 5), (square, 3), (square, 4), (square, 5)} You can see the ordered pairs: (circle, 3), (circle, 4), etc. consist of one element from A first, and then one element from B second. Basically, A x B is like the set of all combinations of elements from A and B. Would that make sense?

    • one year ago
    • Attachments:

See more questions >>>

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.