« previous next »
Pages: [1]   Go Down

Author Topic: TI has a bad CAS, isn't it?  (Read 3411 times)

0 Members and 1 Guest are viewing this topic.

Offline northern_snow

  • LV4 Regular (Next: 200)
  • ****
  • Posts: 132
  • Rating: +17/-1
    • View Profile
TI has a bad CAS, isn't it?
« on: October 14, 2011, 08:12:51 am »
TI using a bad CAS on its 68k and NSpire series.
Both of NSpire CAS and TI-89 titanium can't solve:
integral 1/(sqrt(x+1)+sqrt(x-1))
But both Classpad and hp-50g can...

I wonder what BAD CAS does TI use?
Logged

Offline TIfanx1999

  • ಠ_ಠ ( ͡° ͜ʖ ͡°)
  • CoT Emeritus
  • LV13 Extreme Addict (Next: 9001)
  • *
  • Posts: 6173
  • Rating: +191/-9
    • View Profile
Re: TI has a bad CAS, isn't it?
« Reply #1 on: October 14, 2011, 12:04:42 pm »
Not sure, but from what I've heard many engineers and people in higher level maths recommend the Hp50G over the TI-89. They really give the HP's a ton of praise. TI probably licensed a cheap CAS.
Logged

Offline Hayleia

  • Programming Absol
  • Coder Of Tomorrow
  • LV12 Extreme Poster (Next: 5000)
  • ************
  • Posts: 3367
  • Rating: +393/-7
    • View Profile
Re: TI has a bad CAS, isn't it?
« Reply #2 on: October 14, 2011, 12:12:18 pm »
I asked solve(f(x)=0,x) and it returned "true" (with f(x)=sqrt(x-4sqrt(x-4))+sqrt(x+6-5sqrt(x-4))) :w00t:
Logged
I own: 83+ ; 84+SE ; 76.fr ; CX CAS ; Prizm ; 84+CSE
Sorry if I answer with something that seems unrelated, English is not my primary language and I might not have understood well. Sorry if I make English mistakes too.

click here to know where you got your last +1s

Offline AngelFish

  • Is this my custom title?
  • Administrator
  • LV12 Extreme Poster (Next: 5000)
  • ************
  • Posts: 3242
  • Rating: +270/-27
  • I'm a Fishbot
    • View Profile
Re: TI has a bad CAS, isn't it?
« Reply #3 on: October 14, 2011, 12:14:35 pm »
That's a nasty little integral you have there. I'm not surprised TI's CAS couldn't solve it. From what I'm aware, the CAS on the 89 and the Nspire is a modern form of TI's old DERIVE CAS. That CAS wasn't particularly good, but it's also not entirely horrible. The calcs probably use a limited form that has more problems.

On the other hand, HPs are better for math because HP spends a lot of time programming those calcs to do math very well. They really are the best calcs for math. Good thing calculators were never meant for math, eh? :P

Hayleia: No solutions exist for that one.
« Last Edit: October 14, 2011, 12:18:07 pm by Qwerty.55 »
Logged
+1/-0 karm for this message
∂²Ψ    -(2m(V(x)-E)Ψ
---  = -------------
∂x²        ℏ²Ψ
Pages: [1]   Go Up
« previous next »