Graphic calculator TI 83 Plus: How to use it

last SG · 2013-02-21T11:06:47+00:00

The thing is I'm not that old!The education has changed drastically in such a short time.

Theplayfulgirl brainy SG

I bought a graphic calculator today for A level purpose but when I opened the [email protected]@ It is too complicated.

Anw, Can you tell me how to solve 4x4 matrice with TI 83

Help me. plz
Thank you

Theplayfulgirl brainy SG

For example: 1 -1 1 -1

3 -2 -3 -8

It is a 2x4 matrices in my book. But when i enter this matrices in my calculator,it didn't give me a answer as well...

What happens

wee_ws SG

Hi,

1. Press "APPS".

2. Select "PlySmlt2".

3. Select "SIMULT EQN SOLVER".

4. Select 2 for "EQUATIONS", select 3 for "UNKNOWNS", press "GRAPH".

5. Enter the values in the matrix.

6. Using your values, we obtain, from GC, x = -6 + z, y = -5 + 6z, where z is a real number.

Thanks.

Cheers,
Wen Shih

Theplayfulgirl brainy SG

When I pressed APPS there are only 2 options : "Finance" or " CBL/ CBR".... There is no PlySmlt2. ... I 'm using TI83 plus of Texas Instruments

wee_ws SG

Hi,

You need to download the apps from the Internet site then:

http://education.ti.com/en/asia/product-resources/singapore_apps/ti-84-plus-operating-system

Get a teacher from your school to help you with that.

Cheers,
Wen Shih

SBS n SMRT SG

TI 83 or TI 84

TI83 will not have the apps , do get a TI84 as it is the latest version and all JC notes uses it

Theplayfulgirl brainy SG

Mine is TI 83 Plus.

Huh. They don't have that apps. OMG.I bought one yesterday. No way that my mother allow me to buy a new one

SBS n SMRT SG

I do advise you to check your edition, is it TI 83 plus or TI 84 plus

a TI 84plus pocket SE is the norm GC for majority (except YJ?) of JCs, the O.S. should be 2.5.5 as you need all the features there to do a A level paper

I strongly advise you to buy or borrow one as it is imperative you have a GC that is up to date.

Theplayfulgirl brainy SG

OK. I will ask my mom. Anw,if I reset my GC, will all the programme be deleted??

Lee012lee SG

OK. I will ask my mom. Anw,if I reset my GC, will all the programme be deleted??

A reset will only revert it back to the original factory default settings.

Sell the TI 83 Plus to get some cash to help to buy the TI 84 PLUS pocket SE.

There is a faster, better and cheaper graphic calculator with colour display ie Casio FX CG 20 that the MOE might approve for use in H2 Maths in this year, so you might wait a little longer before you decide to go to buy the TI 84 PLUS pocket SE.

To see the difference between the two graphic calculators, please refer to my earlier post in the sgforums homework forum link

link

Theplayfulgirl brainy SG

Ok. I will carefully consider your advice.

Anw, there is a function : y =(-x^2 -x +1)/( x^2). I think it can be drawn but curiously that the GC cannot sketch it. Why??

Lee012lee SG

Ok. I will carefully consider your advice.

Anw, there is a function : y =(-x^2 -x +1)/( x^2). I think it can be drawn but curiously that the GC cannot sketch it. Why??

Use long division on -x^2 -x +1)/( x^2) first (recall the O level topic Partial Fraction) before you key the function into the graphic calculator to sketch the graph.

Regards,

Lee012Lee

Theplayfulgirl brainy SG

I turn it into -1 +(-x+1)/x^2 but still cannot sketch... Maybe I misunderstood your answer

Lee012lee SG

I turn it into -1 +(-x+1)/x^2 but still cannot sketch... Maybe I misunderstood your answer

You will need to find the partial fractions to get the function y = -1 -1/x +1/x^2.

Regards,

Lee012Lee

wee_ws SG

Hi,

For the function y =(-x^2 -x +1)/( x^2), we can just simplify directly:

y = (-x^2)/(x^2) - x/(x^2) + 1/(x^2)

= -1 - (1/x) + 1/(x^2).

Note that the curve has asymptotes y = -1 and x = 0.

Thanks.

Cheers,
Wen Shih

Lee012lee SG

Deleted.

Theplayfulgirl brainy SG

It is not a problem that I cannot sketch that graph but a problem that my calculator cannot sketch it.... Anything wrong with it or sth??

Theplayfulgirl brainy SG

Ah...And I have a question. I made a program to solve quadratic equation but the result is fixed number. How can I perform the result in original form. For example.: x^2 =2 I want the result is sqrt 2

Lee012lee SG

The new Casio graphic calculator fx cg 20 has solved the problem.

It can graph the function (-x^2 - x + 1) / x^2 without expressing it into partial fractions. In addition, the function can be keyed as a normal fraction form into fx cg 20 just like the other Casio calculator eg fx 96 sg plus

It can move the scale by pressing the up, down, right and left arrow keys and the graph will shift accordingly ie it is no longer like the TI 84 Plus whereby students are required to go to change the scale by guessing and graph it to have the idea of the whole graph.

The calculator can calculate in surd form too ie 2 sqrt 3 x 3 sqrt 5 = 6 sqrt 15

SBS n SMRT SG

but casio gc banned in A level leh, so no choice,

The skill of using correct windows setting is implicit objective the examiners wanted to test