A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

find the matrix |7 -7 -2| |9 4 8| |7 2 -7| |9 -3 1| |7 -7 3 | |-5 3 7|

  • This Question is Closed
  1. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you already have the matrices

  2. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    are you adding them or something ?

  3. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the question find the matrix product , if possible ? can u explain for me a lit bit

  4. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    that's a really tough one, so it might take a while for me to use the equation button, so hold on a sec, ok ?

  5. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sure

  6. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Make the 3 matrices and add them all together. http://en.wikipedia.org/wiki/Matrix_multiplication#Alternative_descriptions

  7. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    when you multiply a a*b matrix to a b*c matrix, you will always get a a*c matrix

  8. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    in your case you are doing 3*3 and 3*3 so you will have a 3*3 matrix as an answer

  9. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now to determine the entrees, this is the step that you have to do

  10. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the

  11. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[a_11\]

  12. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[a_{11}\]

  13. mathmagician
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    When multiply, you get 10 43 35 116 1 9 -15 58 70, if that was the question

  14. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    term can be figured out by multiplying the 1st row from the first matrix and the 1st column of the second matrix

  15. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so you 7*9 + -7*9 + -2*-5 =10

  16. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    [abc] * [d] [e] = a.d + b.e + c.f [f]

  17. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[a_{12}\]

  18. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    will be calculated by 7*4 + -7*-3 + -2*3

  19. Yuki
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and so forth

  20. 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.