Recognitions:
Gold Member

## TI 89 Titanium Simple Question

It says (the TI site) that the TI-89 Titanium can manipulate symbolically and what not. Well I just have 2 quick questions:

let's say I punch in some equation like $$\frac{dE}{dt}=\dot{Q}-\dot{W}+\sum_i\dot{m_i}h_i-\sum_e\dot{m_e}h_e$$

1.) I could somehow select W (for example) and the calculator would know to solve the expression symbolically for W?

2.) I could then input numerical values for all of the other variables and it would give me the numerical value of W?

Thanks!!!
 PhysOrg.com science news on PhysOrg.com >> Intel's Haswell to extend battery life, set for Taipei launch>> Galaxies fed by funnels of fuel>> The better to see you with: Scientists build record-setting metamaterial flat lens
 Recognitions: Gold Member Anyone have this calculator?
 Recognitions: Gold Member Seriously, answer me. Please So I can buy it for myself for X-mass.

Blog Entries: 14

## TI 89 Titanium Simple Question

I don't know but I think you are asking for way too much ...

I wouldn't rely on calculators for these things

but I see that it does solve DEs
http://www.rowan.edu/open/depts/math...89_for_ODE.pdf

and this says that it can solve for one variable
http://ti-89.org/forums/post-97.html

then there are always limitations.. these equations need to be dumb simple

(I only used it in grade 12 only.. now I have casio fx. It do many conversions and has constant values and solve simple algebraic, quadratic, cubic equations, etc, .. and had it for about 15\$)
 Recognitions: Gold Member Asking way too much? All I want to know is if I punch in a+b+c=d can the calculator return that a=d-b-c and if d=1 b=1/2 c=1/2 Can I input those and have it tell me that a=0. I don't think that is too much... or is it? I have never rellied on calculators to do algebra. But as an engineer entering his junior year, I am sick of doing algebra

Blog Entries: 14
 Quote by Saladsamurai Asking way too much? All I want to know is if I punch in a+b+c=d can the calculator return that a=d-b-c and if d=1 b=1/2 c=1/2 Can I input those and have it tell me that a=0.
yep, I think so .. see that thread:

"you can use solve() function to do it (in algebra menu), put the equation first, then a comma, the the varible you want to isolate. in your example, it would be: solve(x+y=z,x) and it will return you x=z-y. Similarly, if you want isolate y, put: solve(x+y=z,y) and it will return you y=z-x"

I thought you wanted something like
df/dt = Q(t) + W(t) + sigma (f(t)) + sigma (z(t))

I been using casio for my engineering ...

I would recommend going through all the TI manual:
http://education.ti.com/educationpor...9ti.html?bid=6

and comparing it to what you will be doing.. and if your TI calculator would be allowed in the finals.
 Recognitions: Gold Member Cools! thanks for the links!

 Quote by Saladsamurai Seriously, answer me. Please So I can buy it for myself for X-mass.
Yes, I own one (for ~4 years now), and yes, it will do what you want (use the solve, nsolve, and desolve functions). Also, if you get it, download this package and install it on your ti.

Merry schnappsmas.

Recognitions:
Gold Member
 Quote by asdfggfdsa Yes, I own one (for ~4 years now), and yes, it will do what you want (use the solve, nsolve, and desolve functions). Also, if you get it, download this package and install it on your ti. Merry schnappsmas.
Nice, thanks for the tip!