Author Topic: TI-84 program for indefinite integrals?  (Read 102238 times)

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Offline TheCoder1998

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TI-84 program for indefinite integrals?
« on: March 01, 2014, 09:51:21 am »
hey guys,

the symbolic app has a feature to calculate derivatives (the d( function)
could a function like this also be programmed for indefinite integrals?

i've been searching for a function like this for almost a week now and it's driving me crazy  :mad:
any help would be appreciated  :thumbsup:
« Last Edit: April 12, 2014, 06:34:36 am by TheCoder1998 »
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Offline Anima

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Re: TI-84 program for indefinite integrals
« Reply #1 on: March 01, 2014, 01:20:14 pm »
No, unfortunately this is almost impossible except for basic integrals of polynomials like x^2. Mathematica solves indefinite integrals using the Risch algorithm, which is quite difficult to implement.


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Offline aeTIos

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Re: TI-84 program for indefinite integrals
« Reply #2 on: March 01, 2014, 01:22:24 pm »
ZoomMath 500. Be prepared to shed out 100 dollars though.

I bet they have only sold a few copies.
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Offline Sorunome

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Re: TI-84 program for indefinite integrals
« Reply #3 on: March 01, 2014, 02:22:57 pm »
There isn't a free one out there as far as I know, feel free to make one :)

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Re: TI-84 program for indefinite integrals
« Reply #4 on: March 01, 2014, 03:56:17 pm »
ZoomMath 500. Be prepared to shed out 100 dollars though.

I bet they have only sold a few copies.
It depends. Since it's math-related and maths are 99% of TI calc userbase, it might be selling more than we think, although there's the issue about overly paranoid parents when it comes to online transaction security, and most students are under 18 so no credit card nor Paypal account. Also wasn't there a version of ZoomMath that costed $500?

Offline TheCoder1998

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Re: TI-84 program for indefinite integrals
« Reply #5 on: March 03, 2014, 01:31:18 am »
ugh, i'm not buying zoommath, i just hate the fact that they charge money for it :mad:
i'd rather spend my summer vacation trying to program one myself (even if it's impossible)
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Re: TI-84 program for indefinite integrals
« Reply #6 on: March 03, 2014, 02:03:57 am »
ugh, i'm not buying zoommath, i just hate the fact that they charge money for it :mad:
i'd rather spend my summer vacation trying to program one myself (even if it's impossible)

Well, at any rate if Zoommath does it, it shows itself to be at least partially possible.

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Offline TheCoder1998

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Re: TI-84 program for indefinite integrals
« Reply #7 on: March 06, 2014, 11:46:43 am »
i was wondering, does anyone here actually own zoommath?
is it illegal to (partially) share the code?
« Last Edit: March 06, 2014, 11:49:54 am by TheCoder1998 »
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Offline thepenguin77

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Re: TI-84 program for indefinite integrals
« Reply #8 on: March 06, 2014, 11:59:40 am »

Quote
i was wondering, does anyone here actually own zoommath?
is it illegal to (partially) share the code?


ZoomMath is free to download so you could look through the code yourself. What you buy is a key to unlock all of the features.
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Re: TI-84 program for indefinite integrals
« Reply #9 on: March 06, 2014, 12:19:40 pm »
ZoomMath would not be at all impossible to rewrite. Take Symbolic and work from there to make a full-fledged CAS. In the end it would probably have more features.

Offline TheCoder1998

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Re: TI-84 program for indefinite integrals
« Reply #10 on: March 06, 2014, 01:04:14 pm »
ZoomMath is free to download so you could look through the code yourself. What you buy is a key to unlock all of the features.

really?
does anyone know how i could decompile an app and look through the code?
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Re: TI-84 program for indefinite integrals
« Reply #11 on: March 06, 2014, 01:17:02 pm »
The main concern would be speed. You can't afford to spend 5 minutes waiting on a result from your calculator.
Decompiling an app is simple. The are online disassemblers, you can find em under 'tools' on the frontpage. You'll have to figure out which code does what,  though, because comments aren't compiled ;)
« Last Edit: March 06, 2014, 01:21:20 pm by aeTIos »
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Offline TheCoder1998

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Re: TI-84 program for indefinite integrals
« Reply #12 on: March 24, 2014, 01:17:36 pm »
so, it's been a while now, and i've decided that i still want to calculate my indefinite integrals
so how do i decompile zoommath?
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Offline TheCoder1998

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Re: TI-84 program for indefinite integrals
« Reply #13 on: March 27, 2014, 12:30:04 pm »
bump,

anyone?
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Offline Dapianokid

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Re: TI-84 program for indefinite integrals
« Reply #14 on: March 27, 2014, 01:01:49 pm »
For the most part, decompiling an app and determining the structure of and purposes and functions of the code is simple. In fact, I used to do this without actually decompiling (although it was slower) and just reading bytecode.
According to aeTIos, there is a tool at Omni for it...
Keep trying.