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Math Help - TI-92 question

  1. #1
    Forum Admin topsquark's Avatar
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    TI-92 question

    TPH recently posted a problem involving the expression
    \frac{ax^3 + bx^2 + cx + d}{ex^3 + fx^2 + gx + h}

    When I type this into my '92 it just sits there being "busy." All of my variables are cleared. Does anyone know what the calculator is trying to do here? It "hangs" for more than five minutes!

    Thanks!
    -Dan
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by topsquark View Post
    TPH recently posted a problem involving the expression
    \frac{ax^3 + bx^2 + cx + d}{ex^3 + fx^2 + gx + h}

    When I type this into my '92 it just sits there being "busy." All of my variables are cleared. Does anyone know what the calculator is trying to do here? It "hangs" for more than five minutes!

    Thanks!
    -Dan

    You do know that the solution is not unique don't you. Try making either the numerator or denominater monic.

    RonL
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  3. #3
    Moo
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    Hello,

    Also be careful, don't type ax, type a*x^3, etc
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  4. #4
    Eater of Worlds
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    Mine does the same thing. Perhaps it is blowing its mind.
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    Question

    Quote Originally Posted by galactus View Post
    Mine does the same thing. Perhaps it is blowing its mind.
    Same here. I would guess one of its simplification routines gets stuck in an infinite loop somewhere. I played around with it and it seems to hang on many similar expressions involving ratios of polynomials with variable coefficients, but those of second degree seem to work, and eliminating certain terms or replacing some of their coefficients with constant expressions often takes care of it. Oh well.
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  6. #6
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by CaptainBlack View Post
    You do know that the solution is not unique don't you. Try making either the numerator or denominater monic.

    RonL
    Nope. It hangs using monic polynomials as well. Good thought, though.

    -Dan
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