Post your ideas for new math programs here, or build on ideas posted by other visitors.

I have just created a program that does binomial expansions for you but I want it to display the answer more user friendly for example?
The problem is (2x+5y)^3
When you put in all the info I have it display the anser like this.
NX^3 N=8
+NX^2Y N=60
+NXY^2 N=150
+NY^3 N=125
But I want it to display it like this
8X^3 +60X^2Y +150XY^2 +125Y^3

If anyone knows how to put a variable in text like I have above it would be really nice. If you know how please send a post on how to do it.

I have an equation solver that works quite well, however, when you try to set up an equation that divides by X, this happens:
ERR:ITERATIONS
I know it stores the equations in the Y= variables, I just need to know if there is any other variables in which equations can be stored so that they can be solved properly.
Any help will be greatly appreciated (and credited),
SilverCalcKnight

Does anyone have any idea how to make a program display a number in fraction form on the TI-83? I am trying to write a program to convert numbers to fractions as multiples of pi, e square root of two, three, and i can't fiure how to make the program display the fraction, not the decimal.repeating decimal. NOTE: the built in to-fraction function, (MATH, 1) causes my programs to stop executing and display ERROR:Syntax, or to not change the decimal to fraction form at all.

I am having trouble making a calculus program for my TI-83+ SE. I need a program that can do derivatives and also do epsilon and delta. If anyone has any kind of program like these then e-mail me the source code! Thanks!

Problem:



Write for us a composite pattern representing rats and their off-spring. Write three or more algorithms in the form of a strategy pattern for controlling their population growth.



Given that we start with a small population of 22 rats and 49 off-spring, write an algorithm to calculate the number of rats at any given future date.



Your algorithm should be flexible enough for me to specify strategies in composite or chain so that I may test population control using different combinations of strategies. (Population control may also include predators.)



Write unit tests to satisfy the requirement that each strategy or strategy combination may not allow the population to grow but also never make them extinct.



Rattus Novegicus:

Body Temp: 90 degrees F (35.9 - 37 5 degrees C)

Respiration Rate: 85.5 BPM

Weight:

* Adult Male 300 g

* Adult Female 200 g

* Newborn 5 g

Water Consumption: 40 ml (100 ml/kg/day)

Food Consumption: 32 gm (100 ml/kg/day)

Sexual Maturity:

* Male 13 weeks

* Female 13 weeks

Estrus Cycle: 4 - 5 days

Gestation period: 20 - 22 days

Life Span: 3 years

Average Litter size: 7 - 11

Breeding Life:

* Male 1.5 years

* Female 1.5 years

Age at weaning: 21 days

Recommended Temperature: 64.4-78.8 degrees F(18-26 degrees C)

Relative Humidity: 40 -70%

Hey I was looking for a program for a TI-84 Plus that I can use for trig so all I have to do is enter the three things I know about the triangle(A,B,C,a,b, and c) and the calculator will tell me the rest of the answers. Any ideas? Email me at donovan@slvtech.com make sure subject line says math. Thanks

hey i dont know if you already found what you were looking for but i have the source code for a program that i wrote about a year ago its kind of detailed but it sounds like what you were looking for

:Menu("WHAT DO YOU KNOW","3 SIDES",A,"2 SIDES 1 ANGLE",B,"1 SIDE 2 ANGLES",C)
:Lbl A
:ClrHome
:Disp "SIDE OPPOSITE"
:Input "UNKNOWN ANGLE=",A
:Input "SIDE 2=",B
:Input "SIDE 3=",,C
:ClrHome
:(A^2-B^2-C^2)->K
:-2BC->L
:(press 2nd & cos)(K/L)->P
:(B^2-A^2-C^2)->M
:-2AC->N
:(press 2nd & cos)(M/N)->Q
:C^2-B^2-A^2->O
:-2AB->U
:(press 2nd and cos)(O/U)->R
:Stop
:ClrHome
:Disp "ANGLE 1=",P
:Disp "ANGLE 2=",Q
:Disp "ANGLE 3=",R
:Stop
:Lbl B
:ClrHome
:Input "SIDE 1=",A
:Input "SIDE 2=",B
:Disp "INCLUDED"
:Input "ANGLE=",C
:A^2+B^2-2AB*cos(C)->P
:sqrrootP->Q
:(A^2-B^2-Q^2)->R
:-2BQ->T
:(press 2nd and cos)(R/T)->S
:(B^2-A^2-Q^2)->V
:-2AQ->W
:(press 2nd and cos)(V/)->U
:ClrHome
:Disp "SIDE=",Q
:Disp "ANGLE 1=",S
:Disp "ANGLE 2=",U
:Stop
:Lbl C
:ClrHome
:Input "KNOWN SIDE"=,A
:Disp "ANGLE OPPOSITE OF"
:Input "KNOWN SIDE",B
:Input "ANGLE 2",Z
:180-(Z+B)->Y
:(sin(Y)A)/sin(B)->X
:(sin(Z)A)/sin(B)->W
:ClrHome
:Disp "ANGLE =",Y
:Disp "SIDE 1=",X
:Disp "SIDE 2=",W
:Stop

I was wondering if your program would also work for a ti-83 plus. I'm pretty sure it should but all I get when I insert numbers is done and nothing else. Any ideas?

The stops are in the wrong places. They should be after ALL of the code for that particular label.

Don't put Stop. Put End

I made some cool programs that will solve the sum of an arithmatic series, sum of a geometric series, and the sum of an infinite geometric series.

thats cool, but how do you do it, a little info would be great

the way i did it was assigning the variables in the equasion to letters in the calc and then making the calc let me substitute numbers for the variables. then tell the calc the formula using the assigned variables.

With parabolas can anyone make a program that goes from vertex form to standard form?

I make a program that could do that and solve for a bunch of other stuff dealing with parabolas, but i dont remember if i finished it. i'll post it when i can copy it (it shouldn't be long).

I was design a program that calculate the Euler´s methode aproximation for a firts order differential equation and I likes to public it on this page, how can I do it?.

If someone likes to have this program write to froilan1986@hotmail.com

where is my commentary?

You don't get commentary 5 seconds after you post something.

I'm not exactly sure if I'm doing this right, and I'm not exactly sure I will be able to find this again (as I am not familier with this place), so you might have a better chance at contacting me at learz0@yahoo.com

I would like a program (in basic) for the TI-83+ SE calculator that can SORT PERMUTATIONS.

I have a program that can sort COMBINATIONS, but not PERMUTATIONS.

Perferably, it should sort them in order from least-to-greatest. My combination program used matricies to do it.

It is for a Discrete mathmatics class, and is related to the "Generating Combination and Permutations" section in any Discrete book.

Again, please note that I need a program, not an algorithim.

Lastly, if this is in the wrong place, sorry.

Okay, I made a post yesterday, but since 24 hours have passed, and I couldn't find it on any page, I'm going to make it again.
I would like to point out that the fastest way to contact me is via email at learz0@yahoo.com

Now for the program I would like:
I currently have a program that can sort COMBINATIONS. I need a program that can sort PERMUTATIONS. This program should be in basic for the TI-83+ SE.

Now, my COMBINATION sorting program uses matricies to sort them, but I couldn't do it with Permutations.

This is for a Discrete class, and the general idea can be found in any Discrete book under "Generating Permutations and Combinations."
Also note that I need a program, not an algorithim.

Thanks.

Hey i recently finished writing a great quadratic formula program with error checking. Check my next post for the code.