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  1. #1
    dogukan's Avatar Praeses
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    Default uhh, mathematics...need help!!

    Well I'm not good at mathematics AT ALL and I've been given a big task.
    Anyways I'm trying to write an equation by using some data I have been given earlier. I have graphed the data and decided it was close to cubic. SO I'm going to write a cubic equation. I chose the points like, starting point, max, min and one random.

    X=2, 8a+4b+2c+d
    X=5, 125a+25b+5c+d
    X=15, 3375a+225b+15c+d
    X=20, 8000a+400b+20c+d


    When I place the X values to functions I get this....now I'm supposed to use matrice to write an equation...how can I do that? Or is there an alternative way?
    Thanks if you can help and sorry if this is the wrong place.


    PS:It would be awesome if somebody told me how I can use mathematical signs in Word 2003
    "Therefore I am not in favour of raising any dogmatic banner. On the contrary, we must try to help the dogmatists to clarify their propositions for themselves. Thus, communism, in particular, is a dogmatic abstraction; in which connection, however, I am not thinking of some imaginary and possible communism, but actually existing communism as taught by Cabet, Dézamy, Weitling, etc. This communism is itself only a special expression of the humanistic principle, an expression which is still infected by its antithesis – the private system. Hence the abolition of private property and communism are by no means identical, and it is not accidental but inevitable that communism has seen other socialist doctrines – such as those of Fourier, Proudhon, etc. – arising to confront it because it is itself only a special, one-sided realisation of the socialist principle."
    Marx to A.Ruge

  2. #2
    dogukan's Avatar Praeses
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    Default Re: uhh, mathematics...need help!!

    allright, how do I find inverse of a 4x4 matrice
    "Therefore I am not in favour of raising any dogmatic banner. On the contrary, we must try to help the dogmatists to clarify their propositions for themselves. Thus, communism, in particular, is a dogmatic abstraction; in which connection, however, I am not thinking of some imaginary and possible communism, but actually existing communism as taught by Cabet, Dézamy, Weitling, etc. This communism is itself only a special expression of the humanistic principle, an expression which is still infected by its antithesis – the private system. Hence the abolition of private property and communism are by no means identical, and it is not accidental but inevitable that communism has seen other socialist doctrines – such as those of Fourier, Proudhon, etc. – arising to confront it because it is itself only a special, one-sided realisation of the socialist principle."
    Marx to A.Ruge

  3. #3
    Simetrical's Avatar Former Chief Technician
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    Default Re: uhh, mathematics...need help!!

    The best way to find the inverse of a matrix by hand is Gauss-Jordan elimination (unless the matrix is 2×2, which yours isn't). Of course, you can also plug it into a CAS if you have access to one.
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