Results 1 to 3 of 3

Math Help - ti 89 titanium calculus malfunction

  1. #1
    Newbie
    Joined
    Apr 2009
    Posts
    1

    ti 89 titanium calculus malfunction

    I've got a ti 89 titanium and one of its many valuable qualities is its ability to integrate and differentiate.

    However, just recently, it have not been functioning correctly. When I try to calculate indefinite integrals or derivatives, my calculator returns a number instead of an expression.

    Ex:
    entered ∫xdx
    keystrokes:[2nd] [∫] [X] [,] [X] [)]
    returns: 25/2

    entered d/dx(x^2)
    keystrokes:[2nd] [d] [X] [^] [2] [,] [X] [)]
    returns: 10


    The calculator should be returning expressions involving the variable in question. I have no equations in the y editor, no programs that I have created or are aware of that might cause this and I have tried removing all the batteries with the idea in mind that it might reset the defaults. No luck.

    Any suggestions?
    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Oct 2005
    From
    Earth
    Posts
    1,599
    Going by your two examples the calculator is using x=5. You might have just saved this value. I forgot how exactly but there is a way to clear all stored data of this sort. Look around in the memory or maybe someone else can tell you explicitly. Luckily it's calculating the problems correctly for x=5.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor Reckoner's Avatar
    Joined
    May 2008
    From
    Baltimore, MD (USA)
    Posts
    1,024
    Thanks
    75
    Awards
    1

    Smile

    Quote Originally Posted by Jameson View Post
    Going by your two examples the calculator is using x=5. You might have just saved this value. I forgot how exactly but there is a way to clear all stored data of this sort. Look around in the memory or maybe someone else can tell you explicitly. Luckily it's calculating the problems correctly for x=5.
    I agree. This is not a malfunction.

    Press F4 to open the "Other" menu, and select "4:DelVar". Delete x with "DelVar x" and you should be okay. You can also press [2ND] [VAR-LINK], scroll down to x, press F1, and choose Delete.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Recursion on ti-89 titanium
    Posted in the Calculators Forum
    Replies: 1
    Last Post: April 15th 2010, 05:57 PM
  2. HP50g vs. TI-89 Titanium
    Posted in the Math Software Forum
    Replies: 2
    Last Post: January 30th 2009, 09:34 PM
  3. Ti- 89 Titanium question
    Posted in the Calculators Forum
    Replies: 1
    Last Post: January 5th 2009, 02:52 PM
  4. Volume of titanium
    Posted in the Math Topics Forum
    Replies: 4
    Last Post: September 2nd 2008, 04:46 PM
  5. TI-89 Titanium: GRAPHING
    Posted in the Calculators Forum
    Replies: 1
    Last Post: August 26th 2008, 07:40 PM

Search Tags


/mathhelpforum @mathhelpforum