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

Calcmathlete Group Title

Matrix Help!

  • 2 years ago
  • 2 years ago

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

    • 2 years ago
  2. agentc0re Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    what type of math class is this?

    • 2 years ago
  3. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    It's math team :) But it is Algebra II

    • 2 years ago
  4. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    I guess this is what you wanted :) |dw:1343828412416:dw|

    • 2 years ago
  5. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Wait, what? o.O I understand what you did when you did the cofactor part, but not after that.

    • 2 years ago
  6. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    tell me on my drawing wht didnt u understand please

    • 2 years ago
  7. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1343828609211:dw| Also, that wasn't the answer they gave?

    • 2 years ago
  8. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Or was that just a part of the process?

    • 2 years ago
  9. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    just calculations O.o|dw:1343828726092:dw|

    • 2 years ago
  10. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    How does that work? o.O Sorry, I just haven't done TOO much with matrices yet...

    • 2 years ago
  11. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    Hmmmm....im sorry i am not sure how to explain you why it is like that....:( it just is like that hmmmm....u can try these...they r pretty good http://www.khanacademy.org/math/algebra/algebra-matrices?k

    • 2 years ago
  12. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Well, the final answer is a matrix...can you tell me what topic for matrices to watch? I've watched all of them to the extent of Algebra II material.

    • 2 years ago
  13. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    Hmmmm....maybe I've misunderstood wht u want to find... hang on a sec

    • 2 years ago
  14. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    watch inverting matrices

    • 2 years ago
  15. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Wouldn't the inverse be \[\left[\begin{matrix}-2 & 1 \\ 4 & 4\end{matrix}\right]\]

    • 2 years ago
  16. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Or do I multiply by the reciprocal of the determinant?

    • 2 years ago
  17. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    tell me smth u want to find the inverse of the |dw:1343829407799:dw|

    • 2 years ago
  18. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Would I perform this: \[-\frac1{12}\left[\begin{matrix}-2 & 1 \\ 4 & 4\end{matrix}\right]\]

    • 2 years ago
  19. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yes. I want to find the inverse of what's above in your picture.

    • 2 years ago
  20. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    learnt this At Khan's videos so jusat plug in the numbers now |dw:1343829481250:dw|

    • 2 years ago
  21. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    or read this...is very well explained http://dcann.myweb.uga.edu/lect08add.pdf

    • 2 years ago
  22. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Isn't that what I did above? |dw:1343829681330:dw|

    • 2 years ago
  23. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    yup :)

    • 2 years ago
  24. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Alright, so the answer would be: \[\left[\begin{matrix}\frac16 & -\frac1{12} \\ -\frac13 & -\frac13\end{matrix}\right]\]

    • 2 years ago
  25. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    shouldnt it be |dw:1343830119553:dw|

    • 2 years ago
  26. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Is there supposed to an aboslute value on the A? not sure...I thought that a and d switched places and that b and c negated...maybe I'm wrong?

    • 2 years ago
  27. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    no abs value

    • 2 years ago
  28. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    So it would be correct what I did?

    • 2 years ago
  29. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    hang on a sec pls...im on the phone

    • 2 years ago
  30. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    i said so...from the second link i sent u

    • 2 years ago
  31. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Wait. Let me check the link...

    • 2 years ago
  32. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    oh wait ...-_-

    • 2 years ago
  33. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I have not gone that far into matrices quite yet...haven't learned to transpose... -_-

    • 2 years ago
  34. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    it was as u said...sorry...it's too hot in here -_-'' I'm not thinking well :p |dw:1343830633083:dw|

    • 2 years ago
  35. Calcmathlete Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    lol ok. Thanks :)

    • 2 years ago
  36. angela210793 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1343830704511:dw|

    • 2 years 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.