TI Nspire CAS step by step

→ **MyCalcs** profile · by **justpassingby** » 14 Oct 2014, 20:40

Hi,

x=[(5000/y) - 1] * 1/2]
x=[(6000/y) - 1] * 1/9]

Can anyone with a Ti Nspire CAS tell me if it can solve a system of equations like this one step by step. And if it doesn't, is there is any program to do that?

What about the Ti Nspire non-CAS, can it solve an equation like this? If yes, how?

Thanks.

My calculator programs · by **Adriweb** » 14 Oct 2014, 20:42

With a system and solve (CAS) / nSolve or linSolve (non-CAS, I think the latter is the one needed) I believe, it will.
However, no steps.

→ **MyCalcs** profile · by **justpassingby** » 14 Oct 2014, 20:53

Thanks. I am sorry but I meant a system of equation (I already corrected the post). Is the answer the same? Thanks.

My calculator programs · by **Adriweb** » 15 Oct 2014, 02:10

Yes that's what I meant too.

Use the system template in the templates window, inside the solve command :

→ **MyCalcs** profile · by **Bisam** » 15 Oct 2014, 06:19

Il faut bien sûr écrire linSolve(système, variable1, variable2,...) (contrairement à ce qu'on voit sur l'image d'Adriweb qui n'a mis qu'un "x" au lieu de "x,y")

Si tu veux la résolution "étapes par étapes", c'est également disponible.
Dans la bibliothèque "linalgcas", tu as une fonction "simultstep" qui s'utilise avec la même syntaxe et décrit les étapes à effectuer.

Cette bibliothèque est présente à l'origine sur les Nspire CAS et CX CAS.

My calculator programs · by **Adriweb** » 15 Oct 2014, 06:37

Faut croire que avec le x tout seul ca marche aussi, cf screenshot, non ?
(Au debut j'avais essayé avec x et y, mais je me suis pris un message d'erreur a la gueule, donc...).

Et, bien vu pour simulstep, je l'avais oublié.

Mais il passe par les matrices non ?

→ **MyCalcs** profile · by **justpassingby** » 15 Oct 2014, 20:02

Thank you both.

@Adriweb When I use the linsolve command, even with x instead of x and y, it gives an argument error. It says to use a system of linear equations. My TI Nspire is not CAS. Is your calculator CAS?

@Bisam I am sorry but I don't understand much about calculators. Can you tell me how do I get to linalgcas and simultstep? And does it give all the steps to solve the system?

→ **MyCalcs** profile · by **Bisam** » 15 Oct 2014, 20:24

"simultstep" is also available on non CAS calculators.

Here is how to proceed :
1) check in "Mylib" folder if "linalg" folder is present
2) if it is, "refresh the libraries" by pressing

3) press

to open the library shelves and find the function "simultstep"...
4) Enjoy !

→ **MyCalcs** profile · by **justpassingby** » 15 Oct 2014, 20:45

Thanks. I already found it but when i use this system of equations it gives an error "Variable is not defined". It says that "no value is assigned to variable. Use one of the following commands".