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Math Help - How Do I Sequence Graph On TI-84

  1. #1
    Member Ranger SVO's Avatar
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    How Do I Sequence Graph On TI-84

    I use both a TI-89 and a TI-84. I can graph the recursive sequence on the TI-89 but not in the 84. I must be entering the sequence wrong.

    In the TI-89 it is entered as follows:
    u1=1.015825 * u1(n-1)
    ui 1= 4000

    It is graphing properly on the TI-89

    The TI-84
    nMin = What do I enter here?
    u(n) = I will enter my recursive equation here
    u (nMin) What do I enter here?

    Can anyone help?
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  2. #2
    Super Member
    earboth's Avatar
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    Quote Originally Posted by Ranger SVO
    I use both a TI-89 and a TI-84. I can graph the recursive sequence on the TI-89 but not in the 84. I must be entering the sequence wrong.
    In the TI-89 it is entered as follows:
    u1=1.015825 * u1(n-1)
    ui 1= 4000
    It is graphing properly on the TI-89

    The TI-84
    nMin = What do I enter here?
    u(n) = I will enter my recursive equation here
    u (nMin) What do I enter here?

    Can anyone help?
    Hello,

    1. Set the TI84 into the SEQ-mode.

    2.
    nMin = the smallest value for n, best would be to start with n = 1
    u(n) = that's OK. You know, that you have to type:
    1.015825*(2nd) (7) ((APPS) -1)
    The bold text in brackets mean the labels of the keys of the TI84
    u (nMin) If I understand the "ui 1 = 4000" right then it is the start value.

    Afterwards you have to adjust the window:
    nMIN = 1
    nMax = 50
    PlotStart = 1
    PlotStep = 1
    Xmin = 16
    Xmax = 16
    Xscl = 1
    Ymin = 3500
    Ymax = 8000
    Yscl = 500

    Then I get a line. I don't know what you wanted to draw, but finally the TI84 draws at least something.

    I hope this will help a little bit further.

    Greetings

    EB
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