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Wait, you're saying that calculators now do symbolic differentiation and integration (like sympy and mathematica)? Kids today...

TheJoeMan 3y ago
My recent TI-nspire calculator had a track pad mouse built in…
deleted 3y ago
[deleted]
lacksconfidence 3y ago
My handheld calculator, a Ti-89, did basic symbolic differentiation (and maybe integration, it's been awhile) in the late 90's.
- LoganDark 3y ago
  Oh hey, I have a TI-89 Titanium. It can emulate the gameboy advance playing Pokémon Red at 30FPS. :)
  - lacksconfidence 3y ago
    lol, thats awesome. i suppose i shouldn't be surprised. Can do a heck of a lot with a couple dollars of silicon these days.
    - LoganDark 3y ago
      And they mark up the price to $200 (that's what the device costed... a 68k in 2017...)
      - hughesjj 3y ago
        Iirc they had to lobby college board to change the rules to allow colored screens on exams since the black and white screen was more expensive than the colored ones since no one made the black and white ones anymore I'd be open to allowing smartphones/tablets on all tests so long as there's no internet. Note taking is more important then ever imo, and knowing how to apply things rather than doing he computational machinery in your head is the more valuable skill to spend time developing (not that we shouldn't teach mental computation at all, just de focus it)
        LoganDark 3y ago
        > Iirc they had to lobby college board to change the rules to allow colored screens on exams since the black and white screen was more expensive than the colored ones since no one made the black and white ones anymore Shouldn't hike the prices on the super old TI-89 Titanium unless the screen (and the CPU, and etc.) is really that much more expensive now.
skulk 3y ago
The TI-Nspire CAS (computer algebra system) can do very complicated symbolic antidifferentiation, like ones that you'd do by hand with repeated integration-by-parts. It can even solve many kinds of simple ODEs!
twodave 3y ago
That’s how I got through calculus. I learned how to integrate/differentiate once, then programmed those operations into my TI-82 using whatever awful version of basic those things supported.
- 8192kjshad09- 3y ago
  You programmed SYMBOLIC integration on a TI-82 but couldn't do it by hand? Are you sure you are remembering that right? Symbol integration is non-trivial.
  - twodave 3y ago
    Almost certainly not. It happened over 20 years ago so my memory is fuzzy, but I’d guess I still had to tell it which formula I wanted to integrate with. So to study I just had to be able to identify the correct formula. You might argue that’s the not much harder than by hand, but I was exceedingly lazy (still am, but now married with kids so it’s buried deep haha).

TheJoeMan 3y ago

My recent TI-nspire calculator had a track pad mouse built in…

deleted 3y ago

[deleted]

lacksconfidence 3y ago

My handheld calculator, a Ti-89, did basic symbolic differentiation (and maybe integration, it's been awhile) in the late 90's.

LoganDark 3y ago
Oh hey, I have a TI-89 Titanium. It can emulate the gameboy advance playing Pokémon Red at 30FPS. :)
- lacksconfidence 3y ago
  lol, thats awesome. i suppose i shouldn't be surprised. Can do a heck of a lot with a couple dollars of silicon these days.
  - LoganDark 3y ago
    And they mark up the price to $200 (that's what the device costed... a 68k in 2017...)
    - hughesjj 3y ago
      Iirc they had to lobby college board to change the rules to allow colored screens on exams since the black and white screen was more expensive than the colored ones since no one made the black and white ones anymore I'd be open to allowing smartphones/tablets on all tests so long as there's no internet. Note taking is more important then ever imo, and knowing how to apply things rather than doing he computational machinery in your head is the more valuable skill to spend time developing (not that we shouldn't teach mental computation at all, just de focus it)
      - LoganDark 3y ago
        > Iirc they had to lobby college board to change the rules to allow colored screens on exams since the black and white screen was more expensive than the colored ones since no one made the black and white ones anymore Shouldn't hike the prices on the super old TI-89 Titanium unless the screen (and the CPU, and etc.) is really that much more expensive now.

skulk 3y ago

The TI-Nspire CAS (computer algebra system) can do very complicated symbolic antidifferentiation, like ones that you'd do by hand with repeated integration-by-parts. It can even solve many kinds of simple ODEs!

twodave 3y ago

That’s how I got through calculus. I learned how to integrate/differentiate once, then programmed those operations into my TI-82 using whatever awful version of basic those things supported.

8192kjshad09- 3y ago
You programmed SYMBOLIC integration on a TI-82 but couldn't do it by hand? Are you sure you are remembering that right? Symbol integration is non-trivial.
- twodave 3y ago
  Almost certainly not. It happened over 20 years ago so my memory is fuzzy, but I’d guess I still had to tell it which formula I wanted to integrate with. So to study I just had to be able to identify the correct formula. You might argue that’s the not much harder than by hand, but I was exceedingly lazy (still am, but now married with kids so it’s buried deep haha).