20 Most Recent Texas Instruments TI-84 Plus Silver Edition Graphic Calculator - Page 2 Questions & Answers

There are several ways of doing this. Since you're using a graphing calculator, you can always graph it as a function of 'a' and use the graphical tools. Another way is to use the solve() function. For example, to find the value of a where the integral of sin(x) from 0 to a equals one, enter solve(fnInt(sin(X),X,0,A)-1),A,1.5) solve( and fnInt( are accessible through the CATALOG. The 1.5 is an initial guess.

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Shift [x^-1] allows you to access the matrix features. Under Names you select the names you want to use for your matrices. Under Math you access the various commands. Under Edit you edit the contents of your matrices.

Calculator may be suffering from one "Taking it apart" too many.

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Try here: https://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetNumber=12154

You must have one of the newer OS versions (MP 2.53 and higher). You don't have anything under F5.

Here it is

2nd will activate the second function on a key.

Press [2nd][+] then 7 and choose exactly which reset you want.

You cannot. To evaluate an expression (not an equation or an equality) key it in and press ENTER.

Turn the calculator, open the battery compartment at the bottom, remove the batteries.

The key is probably defective. But there is no way the calculator will remain for ever turned ON if you remove the power supply (batteries).

To reduce the contrast Press the [2nd] key and release it. Press the [DownArrow] key and hold pressure. The screen will become lighter. Release the down arrow when the screen is to your liking.

Contrast Feature If the contrast setting is too dark (set to 9) or too dim (set to 0) the unit may appear as if it is malfunctioning or turned off. To adjust the contrast, press and release 2nd, and then press and hold upper arrow or down arrow key.

1 var means only one: where would it put the comma?

The comma key on the TI 84 SE is above the 7 key, and it is just left of (, right of x squared, and below SIN. thats where the "," key is. If you're asking something else, please clearify. My understanding is that you don't know where the comma key is. 

If you get Memory Error its meaninig that memory is insufficient to perform the instruction or function. You must delete items from memory before executing the instruction or function. Recursive problems return this error; for example, graphing the equation Y1=Y1. Branching out of an If/Then, For(, While, or Repeat loop with a Goto also can return this error because the End statement that terminates the loop is never reached.

hi press the clear key if this don' t work try finding the the reset button in the back of the calculator or remove the batteries from it for one minute and put them back in and turn it back on again . if that fails than buy a new calculator because you got a defective calculator that some how got pass inspection. I hope this helps