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Troubleshooting Texas Instruments TI-89 Calculator, Support & Service

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Argument error whenever I type equations with variables.
Whenever I type anything in with a variable "x" it comes up as an "argument error" and won't simplify, factor, or solve...
2 Solutions
graphing
I need to know each key stroke to put the problem in to figure out how to graph.  graphing totally looses  me.  I just don't...
1 Solution
my lcd is bad \r\nthe half is dead
my lcd is bad the half is dead
1 Solution
changed batteries and now won't start up
changed batteries and now won't start up
1 Solution
DISPLAYS 6.599743591E-4 - WHAT'S THAT?
DISPLAYS 6.599743591E-4 - WHAT'S THAT?
1 Solution
In the programs I have made when I use the Request
In the programs I have made when I use the Request enter a integer, I always have to press the alpha button before entering a # in the field...
1 Solution
ti 89 detected but couldn't get status
ti 89 detected but couldn't get status
1 Solution
how do you plot two liner equations on a ti-84?
the problem is i cant graph two lines on my calulator the equations are (2/5)x-(11/5) -3x+8 how do i graph them at the same time?
2 Solutions
what is 419% in fraction form?
what is 419% in fraction form?
1 Solution
Okay... my Ti-89 isn't squaring numbers right.
Okay... my Ti-89 isn't squaring numbers right. I put in -2^2 and I get -4, or I put -3^2 and I get -9 and so forth. I thought and still...
1 Solution
Dimension Error
Hi, whenever I enter my data into the lists and try to attempt a regression, it tells me that I have a dimension error and refuses to do...
2 Solutions
I need to reset my TI-89 Titanium
I need to reset my TI-89 Titanium
2 Solutions
hi so i have to use the cos, sin , and tan
hi so i have to use the cos, sin , and tan functions on my ti-89 but when i press enter it says "Error: protected memory...
1 Solution
solving multiple non-linear equations
I have a TI-89 titanium calculator. I am trying to use the solve() function under the algebra menu to solve multiple equations. What is the...
1 Solution
How to solved the series in my calculator
How to solved the series in my calculator, (integral with sen and cos), AND solve sumatories interval of convergence of the power series....
1 Solution
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