Hi, I am trying to figure out if the TI-84 calculator is able to do "greatest integer fuction" problems on it. Whenever possible, I just wanted to know if you can help me in telling me how to find it in the calculator.

Thank-you so much =D

The greatest integer function (also called a step function) is actually a piecewise defined function with a special definition. The function has the notation f(x)=||x|| or f(x)=[[x]] when it is written, but the TI-83 and the TI-84 designate this function by using f(x)=int(x) and is found in the MATH NUM menu. This function is the greatest integer less than or equal to x. So, f(1)=1 and f(1.4)=1. Since this is a piece-wise function you should use DOT mode.

Posted on Mar 22, 2008

You do the operation to get a decimal number.

Isolate the integer part (to the left of the decimal point)

Convert the non integer part (decimal part) into a fraction.

Write the result as (integer part) (fraction part)

3/2=1.5

Integer part is 1, decimal part is 0.5

0.5 as a fraction is 1/2

3/2= 1 1/2

Isolate the integer part (to the left of the decimal point)

Convert the non integer part (decimal part) into a fraction.

Write the result as (integer part) (fraction part)

3/2=1.5

Integer part is 1, decimal part is 0.5

0.5 as a fraction is 1/2

3/2= 1 1/2

Sep 09, 2014 | Texas Instruments TI-84 Plus Calculator

The **ERR:INVALID DIM** error message may occur

if you are trying to graph a function that does

not involve the stat plot features. The error can

be corrected by turning off the stat plots. To

turn the stat plots off, press y ,and

then select 4:PlotsOff.

• You specified a list dimension as something

other than an integer between 1 and 999.

• You specified a matrix dimension as something

other than an integer between 1 and 99.

• You attempted to invert a matrix that is not

square.

if you are trying to graph a function that does

not involve the stat plot features. The error can

be corrected by turning off the stat plots. To

turn the stat plots off, press y ,and

then select 4:PlotsOff.

• You specified a list dimension as something

other than an integer between 1 and 999.

• You specified a matrix dimension as something

other than an integer between 1 and 99.

• You attempted to invert a matrix that is not

square.

Apr 05, 2014 | Texas Instruments TI-84 Plus Calculator

The poissonpdf function computes a probability at x for the discrete Poisson distribution with the specified mean u, which must be a real number >0. x can be an integer or a list of integers.

As an example, to compute the probability with mean 1.9 and x=4, press

2ND [DISTR] ALPHA [C]

enter 1.9 on the first line and press ENTER

enter 4 on the second line and press ENTER

press ENTER again.

This will paste poissonpdf(1.9,4) onto the command line. Press ENTER again to see the result (about 0.08).

As an example, to compute the probability with mean 1.9 and x=4, press

2ND [DISTR] ALPHA [C]

enter 1.9 on the first line and press ENTER

enter 4 on the second line and press ENTER

press ENTER again.

This will paste poissonpdf(1.9,4) onto the command line. Press ENTER again to see the result (about 0.08).

Oct 05, 2012 | Texas Instruments TI-84 Plus Calculator

For integer powers of 10 you can use the EE shortcut. [2nd][,] displays E.

For non-integer values of the exponent (such as -5.34) you must use the key sequence [2nd][LOG] (10^x) then enter your negative non-integer exponent.

For non-integer values of the exponent (such as -5.34) you must use the key sequence [2nd][LOG] (10^x) then enter your negative non-integer exponent.

Jan 16, 2012 | Texas Instruments TI-84 Plus Silver...

To graph a greatest integer function, follow these steps:

1.) Press Y= 2.) Press MATH, then scroll to the right one column and select "int(" 3.) Enter your function inside of the parentheses, and make sure to put a closing parentheses at the end of the function you are inputting. 4.) After you have closed the parentheses to the "int(" command, add 1 to the end of the equation. This is because the "int(" command tells the calculator to take the lowest integer of the value inside of it. If you add one, then instead of .68 becoming 0, it becomes 1, and 1.724 becomes 2, etc.

1.) Press Y= 2.) Press MATH, then scroll to the right one column and select "int(" 3.) Enter your function inside of the parentheses, and make sure to put a closing parentheses at the end of the function you are inputting. 4.) After you have closed the parentheses to the "int(" command, add 1 to the end of the equation. This is because the "int(" command tells the calculator to take the lowest integer of the value inside of it. If you add one, then instead of .68 becoming 0, it becomes 1, and 1.724 becomes 2, etc.

Feb 27, 2011 | Texas Instruments TI-83 Plus Calculator

Use the rand() function. If you give it a positive integer argument *n*, it will return a random integer in the range in the interval [1, *n*]. You'll find rand() in the MATH/PROBABILITY menu.

Dec 08, 2010 | Texas Instruments TI-89 Calculator

Go to http://education.ti.com/downloads/guidebooks/graphing/84p/TI84Plus_guidebook_EN.pdf
to download the manual. On page 401, you will find the following:

INVALID DIM • The ERR:INVALID DIM error message may occur if you are trying to graph a function that does not involve the stat plot features. The error can be corrected by turning off the stat plots. To turn the stat plots off, press y , and then select 4:PlotsOff. • You specified a list dimension as something other than an integer between 1 and 999. • You specified a matrix dimension as something other than an integer between 1 and 99. • You attempted to invert a matrix that is not square.

INVALID DIM • The ERR:INVALID DIM error message may occur if you are trying to graph a function that does not involve the stat plot features. The error can be corrected by turning off the stat plots. To turn the stat plots off, press y , and then select 4:PlotsOff. • You specified a list dimension as something other than an integer between 1 and 999. • You specified a matrix dimension as something other than an integer between 1 and 99. • You attempted to invert a matrix that is not square.

Nov 11, 2010 | Texas Instruments TI-84 Plus Calculator

The random number generator function is called Ran# and can be accessed
in RUN mode by pressing:

**[OPTN] [F6] [F3] (PROB) [F4] to access the (Ran#)** function

In the paragraph above, the**bold text** in square brackets indicates keypresses,
while the text in parentheses represents the menus that appear at the
bottom of the calculator screen. This also assumes there are no menus on
the bottom of the screen when you begin. If PROB is already on the
screen, then the [F6] key is not necessary, just press [F3] then [F4] at
this point.

The Ran# function generates a random decimal number between 0 and 1. If you need to generate a number with a higher range, then there may be extra steps involved. For example, to choose a random number between 0 and 100, you would enter:

**Ran#×100 or Ran#(100)**

Let's
say you want to simulate a dice roll, where you get an integer between 1
and 6. Your first step would be to do:

**Ran#×6**

This will give you a random decimal number between 0 and 6. But we need an integer, not a decimal. To make it an integer, you would change this to:

**Int(Ran#×6)**

Press**[OPTN] [F6] [F4] (NUM) [F2] to access the (Int)**

This now gives you an integer between 0 and 5. We just need to add 1 to the result.

**Int(Ran#×6)+1**

The result should be an integer between 1 and 6.

In the paragraph above, the

The Ran# function generates a random decimal number between 0 and 1. If you need to generate a number with a higher range, then there may be extra steps involved. For example, to choose a random number between 0 and 100, you would enter:

This will give you a random decimal number between 0 and 6. But we need an integer, not a decimal. To make it an integer, you would change this to:

Press

This now gives you an integer between 0 and 5. We just need to add 1 to the result.

The result should be an integer between 1 and 6.

Mar 03, 2010 | Casio FX-9860G Graphic Calculator

Functions on the calculator are **bold**. Numbers you choose are in *italics*.

For random positive integers between 0 and*n* use the following:

**int** (**rand** * *n*) + 1

**int** is on [Math] [Num] F4

and**rand** is on [Math] [Prob] F4

**rand** returns a random number *x* between 0 and 1 such that 0 < *x* < 1.

**int** returns the integer portion of a number such that **int** 123.456 returns 123 and **int** -123.456 returns -124.

For random positive integers between 0 and

and

Jan 19, 2009 | Texas Instruments TI-85 Calculator

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