Re: TI-M: Equation question for TI-89
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Re: TI-M: Equation question for TI-89
Or do this:
rref [[-1,3,-1][2,-5,3]]
and it should spit out the following:
[[1 0 4]
[0 1 1]]
Dont mess with multiple matrices or bother doing the augmenting
yourself.
----- Original Message -----
From: "Matt C" <snoborder420@yahoo.com>
To: <ti-math@lists.ticalc.org>
Sent: Wednesday, September 20, 2000 12:38 PM
Subject: RE: TI-M: Equation question for TI-89
>
> using a matrix is pretty easy
> make 1 matrix
> -1 3
> 2 -5
> make another
> -1
> 3
>
> then multiply the second one by theinverse of the first one
> A^-1*B and you get your answer
>
>
> -----Original Message-----
> From: owner-ti-math@lists.ticalc.org
> [mailto:owner-ti-math@lists.ticalc.org]On Behalf Of BG
> Sent: Friday, September 15, 2000 12:39 AM
> To: ti-math@lists.ticalc.org
> Subject: TI-M: Equation question for TI-89
>
>
>
> Hi everybody,
>
> I'm new to this list. I have a question that probably has an easy
> answer.
> I am about 50 miles away from my TI-89's manual, so unfortunately I
> can't find my answer there.
>
> PROBLEM: how can I enter a system of equations into my TI-89 and
have
> it solve them?
> For instance:
>
> -1 = -1A + 3B
> 3 = 2A - 5B
>
> What do A & B equal?
>
> This is two equations with 2 unknowns. Isn't there a function to
solve
> this? Can't I do this with a Matrix? If so, could somebody please
tell
> me how to do it on a TI-89? I'm going to need to be able to do it
with
> 3 equations and 3 unkowns, also. I have an old Casio that I can do
it
> on, but my 89 is a great calculator and I'd like to use it for all
my
> needs.
>
> Thanks!
>
> B. G.
>
>
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References: