Question about HP 49g+ Calculator

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My HP won't turn on anymore

I had loaded some tgv files and was using it during a test. Suddenly, while using the equation editor it jammed and then it turned off and never turned on again. When batteries are on, you can notice some activity on the LCD display, but nothing interesting. I tried resetting it and tried taking all batteries off to see if it went back to but nothing happened as well. What should I do? Thank you in advance, Bruno

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Re: My HP won't turn on anymore

I just fixed two "failure to power on" 49g+'s. For the first one I did a moderate slap of the unit against my thigh and then tried a reset (I thought maybe the reset was jammed with some debris) - it worked! The second one just needed me to scrape off some corrosion (an old toothbrush works) from the battery terminals - AJ

Posted on Feb 08, 2008

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Re: My HP won't turn on anymore

Try a cold start, reseting the calculator, introducing an wire in the back small oriffice in the calculator. It may fix the problem.


Posted on Nov 05, 2007

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How do I graph an equation with TI 89?

Just open the Y= equation editor and enter your equation. Use X for T. Make sure the angle unit is in radians.

Nov 10, 2014 | Texas Instruments TI-89 Calculator

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So many questions about how to do specific mathematical equations using specific calculators....

I hear you. The problem is that there a lot of facts and algorithms to remember (approximately) and a human memory is limited. Why bother spend half an hour doing what a calculator can do in a fraction of a second. Personal prowess is a nice thing for show, but if one has to be efficient, a powerful HP calculator is more appropriated than a genius with the Japanese abacus.

Sep 27, 2014 | Calculators

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How to use ti 84 plus calculator to graph linear equations

You have to use Y Editor to define functions on the both sides of the equation and then graph it. Finally option is F5: Intersection.
See captured images for equation 5x+10=-2x-7, y1=5x+10, y2=-2x-7 and x=-17/7



Feb 25, 2012 | Texas Instruments TI-89 Calculator

1 Answer

My graphing calculator won't graph anything. I've entered many equations into y=. I even tried to type in a simple linear equation to see if it would even do that. Nothing happened. The window...

You do not say if you get any error message.
Try to reset the calculator Press [2nd][+] to open memory management.
Press [7][RESET] followed by [1:All RAM] [2:Reset]
Then open the Y= editor and to the right of Y1= type in [X,T,theta,n] and press [ENTER]. You will see the straight line y=x.
Please report back what you get.

Aug 02, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

When i press Y= button and graph quadratic equations the graphs are not accurate i realized that the symbols to the left of Y1 Y2 Y3... Are different they are no longer lines greater than less than etc....

In the Y= editor, scroll down to the equation in question. Press left-arrow until the cursor goes over the symbol. Press ENTER repeatedly to cycle through the various graphing options.

Jun 24, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

Graphing Problem

You have activated the Transfrm Application and you must kick it out of memory.
  1. Press [APPS].
  2. Use the arrow key to scroll up pr down to point to Transfrm.
  3. Select it and press [ENTER]
  4. Select [1:Uninstal] and press [ENTER]
  5. Open the [Y=] function editor to enter your functions and then
  6. press [GRAPH] to have them drawn.

Apr 16, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

How do you type a piecewise function into the TI-84?

Here is an asurd example of a piecewise function
Y1=11 for X less than 10
Y1=3 for X in the range [10, 20[
Y1=X+5 for X in the range [20, 30[
Y1=10 for X larger than 30

Here is the screen capture of the Y= editor window.
You have
  1. the definition of the function within a domain, enclosed in () followed by the domain enclosed in ()
  2. a + to introduce the second piece (definition) (domain)
  3. + a third piece (definition ) (domain)
  4. and so on.
  5. Use the [2nd][TEST] key sequence to access the relational operators, less than, greater than, etc.
Here are two screen captures for the Y= editor and the resulting graph. Yoy have to play with the window dimension to display a clear graph. Note : 3 pluses in equation, 4 pieces in graph.



Mar 09, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Graphing an equation

Press the Y= key to invoke the Y= editor. Enter in your equation.

Press the WINDOW key to set the window parameters.

Press the GRAPH key to have the calculator graph the equation.

For more details and options, see the "Function Graphing" chapter in the Guidebook.

Nov 11, 2009 | Calculators

1 Answer

Suddenly, the graph window reports ERR:UNDEFINED

Go to Window and make sure there are acceptable values for your graph, default is usually 10 and -10 with 1 scale.

Jul 06, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

Stat/List Editor Disappeared

download it again cos the stat/list editor is a app, its not permanantly stuck there. it can be downloaded from the TI website

Feb 22, 2008 | Texas Instruments TI-89 Calculator

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