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My comma key does not work - Computers & Internet

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Get a new keyboard and try it, see if does the same thing.

Posted on Oct 21, 2008

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1 Answer

HP 15C commas and decimals interchanged


Turn the calculator off, press and hold the decimal point key, press ON, then release both keys.

Apr 20, 2013 | HP 15C Scientific Calculator

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The decimal point is now a coma. How do I change it back?


Near the 0 key, the calculator has the markings dot forward slash comma in BLUE. Thus to change the decimal mark from dot to comma or from comma to dot, press the LEFT SHIFT Blue key, followed by 0. The radix mark will toggle from one to the other.

Jan 18, 2011 | HP 20s Calculator

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I am trying to program a TI-82. I cannot find an arrow key --> or a comma. Please help


The arrow is the STO key just to the left of the 1 key. The comma key is just above the 7 key.

Nov 20, 2010 | Texas Instruments TI-82 Calculator

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HOW,AFTER DIALING A NUMBER,DOYOU ENTER A PIN #?


using a comma ',' for evey three second delay you need until the PIN needs to be keyed.
so for example:
8005551212,,1234 will dial the number 8005551212 wait 6 seconds then dial 1234
you can key in a comma by holding down the * key until it changes to a comma

Sep 26, 2010 | Apple iPhone 3G

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Where is the comma key on the ti 84 plus silver edition?


Here is a picture of the keyboard. The comma is in the column of keys below the MODE button. In this column, the comma is between the sine function SIN and the key for the number 7. To its left is the square (x^2) key and to its right is the left parenthesis (.
a37685f.jpg

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

1 Answer

Some keys doesnt work like the comma dot question


the problem may be of the sticky keys or of the keyboard. no else problem is seen in the keyboard.. so, if sticky keys are enabled, disable it from the accessibility options in control panel else change the keyboard !

May 08, 2010 | Gateway MX7120 Notebook PC Notebook

2 Answers

Can i calculate calculus using fx-991ms


If you want to get an answer like 1/2X for d/dx(X^2), you will have to purchase a CAS calculator like Casio's Algebra FX-2 or Classpad. TI series calculators also have CAS.
However, you can calculate the numerical values of derivatives and integrals only.
To calculate the value of a proper integral:

  1. Press the 'ON' key;
  2. Press the Integral key b8325f5.jpg;
  3. Enter your expression (example X^2+X-3 etc);
  4. Press the 'comma' key after your expression;
  5. Input the first limit after comma, input comma again after first limit;
  6. Close brackets;
  7. Press the equals key, display may return after a while with the answer.
for eg to calculate xdx from 0 to 2, input as follows:

dx(X,0,2)

To calculate derivative at a point:

  1. Press Shift and then the integration key.
  2. Enter your function;
  3. Input comma;
  4. input the point at which you want to evaluate the derivative;
  5. Close bracket and press enter.
Example, to calculate d/dx X^2 at 3 input:

SHIFT+dx key X^2,3)

Display looks like this: d/dx(X^2,3).


Oct 23, 2009 | Casio FX-300MS Calculator

3 Answers

Comma key on TI-84 Plus Siver Edition calculator.


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. 

Mar 16, 2009 | Texas Instruments TI-84 Plus Silver...

1 Answer

Sticky keys


Your keyboard needs cleaning.RICHARDM69 

Oct 16, 2008 | Compaq Keyboard

1 Answer

Display shows comma in place of decimal point?


To change the ´comma´, make sure the calculator is switched to off, press (.) key and maintain, switch the calculator ON. This operation changes dot to comma and vice-versa.

Jul 18, 2008 | HP 12c Calculator

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