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Math Help - Math problems

  1. #1
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    Talking Math problems

    Hi
    if you have some free time please do this math problems?!

    1.



    2.
    Given curve reduce to canonical form and determine which curve is it :?: :!:



    please find time to do this math problem I'll be very grateful to you.
    please do it step by step because i am studying for my test.
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  2. #2
    MHF Contributor Bruno J.'s Avatar
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    Hi,

    that's not how it works here! We don't do your homework. You have to show some kind of attempt! Where are you stuck?
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  3. #3
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    here are my attempts

    1.




    2.



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  4. #4
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    Man, for the matrix task I see that you don't understand the basic concepts.
    adjA is matrix not scalar .
    X is 3x3 matrix not scalar.

    1) Hint:

    (A-X)^{-1}+2I=B^{-1}
    (A-X)^{-1}=B^{-1}-2I
    I=(B^{-1}-2I)(A-X)

    This would mean that (B^{-1}-2I) is the inverse of A-X

    So to find (A-X)=(B^{-1}-2I)^{-1} or X=A-(B^{-1}-2I)^{-1}
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  5. #5
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    Smile

    tnx for response

    first problem
    page 1:



    page 2:




    Is this looks like something?
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  6. #6
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    I am afraid that it isn't the correct answer. What for you found A^(-1)?

    Also you did some miscalculations in B^(-1).

    Just work step by step.

    First find B^(-1), then B^(-1)-2I then (B^(-1)-2I)^(-1) and finally A-(B^(-1)-2I)^(-1)
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  7. #7
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    Smile

    xexe I don't have smart answer to the first question
    I found errors in B^(-1) and thanks to you I completed the task
    Thank you
    If you or someone else have a solution for my other problem please help
    or if you have some good link for a similar done example?!
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