Question about Texas Instruments TI-89 Calculator

Ad

The calculator does not give a result of an integration with a constant. The form of the result will depend ob the EXACT/APPROXIMATE mode you have selected.

In the following screen capture, your integral has been evaluated with mode set to EXACT,AUTO, and APPROXIMATE. Pay attention to the syntax.

To set the computational mode to EXACT, press the MODE button use the Function keys F1,F2 or F3 to move from page to page, point to EXACT/APPROX and use the right arrow key to unfold the submenu, then the Up or Down arrow to select AUTO, EXACT or APPROXIMATE and press ENTER to SAVE Configuration.

If the integral cannot be found in EXACT mode, the calculator will echo the command without calculating the integral.

Posted on Apr 29, 2010

Ad

Hi,

a 6ya Technician can help you resolve that issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.

click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Goodluck!

Posted on Jan 02, 2017

Ad

The integral cannot be calculated in terms of the elementary functions. It is given by dilogarithm Li_2. Note here that log stands for the natural logarithm (ln)

Jan 01, 2014 | Texas Instruments TI-89 Calculator

Don't spell it out. Use the integral sign, available by pressing 2nd then 7.

For this example, press 2nd 7 2nd Y X ) , ) ENTER

2nd 7 gets you the integral, 2nd Y gets you the sine.

For this example, press 2nd 7 2nd Y X ) , ) ENTER

2nd 7 gets you the integral, 2nd Y gets you the sine.

Oct 16, 2012 | Texas Instruments TI-89 Calculator

It ts easy to find solution for this problem. Type **int(sin(377x-1.231),x,0.299,3.94)**

See captured image below

Oct 06, 2012 | Texas Instruments TI-89 Calculator

For example, integral:

Sep 06, 2012 | Texas Instruments TI-89 Calculator

Well it is just a calculator, it cannot do all the possible integrals you might think of. You may try to help it a bit by using the usual techniques that you were taught to transform the integral into another it might be able to find: change of variables, integration by parts. You cannot let the success on your AB or BC exam depend solely on the calculator.

May 09, 2012 | Texas Instruments TI-89 Calculator

What do you really want to integrate? 2 to power x (2^x) or x squared (x^2). Look at the screen capture below. The command line shows you the syntax for an indefinite integral.

May 10, 2011 | Texas Instruments TI-89 Calculator

What are you trying to do? The syntax you use depend on what you want to achieve.

Indefinite integral : Integral( ln(x),x) gives the correct answer xln(x)-x

Definite integral : Integral(ln(x),x,1,2) gives the integral of ln(x) between x=1 and x=2

Definite integral between 1 and y : Integral (ln(x), x,1,y) gives the correct expression yln(y)-y +1

By inserting the =0 you are in fact assigning the result of the integration to value 0, and the calculator calculates the integral and assigns 0 to it. This is what my TIVoyage 200 PLT gives me:

{Integral((lnx),x,1) = 0.} returns {x.ln(x)-x+1=0}

which is an equation.

Indefinite integral : Integral( ln(x),x) gives the correct answer xln(x)-x

Definite integral : Integral(ln(x),x,1,2) gives the integral of ln(x) between x=1 and x=2

Definite integral between 1 and y : Integral (ln(x), x,1,y) gives the correct expression yln(y)-y +1

By inserting the =0 you are in fact assigning the result of the integration to value 0, and the calculator calculates the integral and assigns 0 to it. This is what my TIVoyage 200 PLT gives me:

{Integral((lnx),x,1) = 0.} returns {x.ln(x)-x+1=0}

which is an equation.

Apr 17, 2011 | Texas Instruments TI-89 Calculator

You already have something stored with the name x. Either get rid of it or use a different name for the variable of integration.

You can see what variables you have stored by pressing 2ND [VAR-LINK] (the minus key).

You can see what variables you have stored by pressing 2ND [VAR-LINK] (the minus key).

Feb 02, 2011 | Texas Instruments TI-89 Calculator

Press 2ND MATH to bring up the Math menu. Select "Calculus" and then "integrate." Enter the expression, the variable of integration, the lower limit, and the upper limit, separated by commas. Close the final paren and press ENTER or diamond ENTER.

For example, to calculate the integral from 0 to pi of sin(x) dx, you want

INT(sin(x),x,0,pi)

where INT is the integral sign and pi is the lower-case Greek pi.

For example, to calculate the integral from 0 to pi of sin(x) dx, you want

INT(sin(x),x,0,pi)

where INT is the integral sign and pi is the lower-case Greek pi.

Sep 22, 2010 | Texas Instruments TI-89 Calculator

I reset my calculator and this solved the problem. To reset your calculator press [2nd], then [6] (Mem), press F1 (reset), Select 3 for all memory, and select Yes.

Oct 23, 2008 | Texas Instruments TI-89 Calculator

May 21, 2014 | Texas Instruments TI-89 Calculator

Feb 17, 2014 | Texas Instruments TI-89 Calculator

318 people viewed this question

Usually answered in minutes!

Which form are you getting it, in decimal or fraction? Which way do you want it? Can you post exactly what you're entering and what the calculator is producing?

Press MODE, then F2. What is the Exact/Approx setting?

FYI my TI-89 produces x^3/3 when I integrate x^2.

I typed in "F3 2 x ^ 2 , x )"then it gives me 2706867/15625

×