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Posted on Jan 02, 2017

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

Apr 20, 2013 | HP 15C Scientific Calculator

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

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

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

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

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 (.

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

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

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:

**∫**xdx from 0 to 2, input as follows:

**∫**dx(X,0,2)

To calculate derivative at a point:

SHIFT+**∫**dx key X^2,3)

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

However, you can calculate the numerical values of derivatives and integrals only.

To calculate the value of a proper integral:

- Press the 'ON' key;
- Press the Integral key ;
- Enter your expression (example X^2+X-3 etc);
- Press the 'comma' key after your expression;
- Input the first limit after comma, input comma again after first limit;
- Close brackets;
- Press the equals key, display may return after a while with the answer.

To calculate derivative at a point:

- Press Shift and then the integration key.
- Enter your function;
- Input comma;
- input the point at which you want to evaluate the derivative;
- Close bracket and press enter.

SHIFT+

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

Oct 23, 2009 | Casio FX-300MS 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...

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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