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Solve an equation as a fraqtion. Is it possible?
11-02-2018, 08:42 AM (This post was last modified: 11-02-2018 08:44 AM by blevita.)
Post: #1
Solve an equation as a fraqtion. Is it possible?
Hi

I would like to solve a simple equation to two variables.
This is obvious a very simple task for the attached example but as you could imagine, i would like to do the same with much more complex equations.

So my question is, is it possible to solve such an equation to a fraqtion which consists of two variables?
I have tried with solve(...,[x/b]) but i got only an empty result.


If the prime is not able to do so, is there any othe tool out there who can do such a algebraic operation?

Thanks


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11-02-2018, 10:40 AM
Post: #2
RE: Solve an equation as a fraqtion. Is it possible?
The CAS is where you would do this



   
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11-02-2018, 11:33 AM
Post: #3
RE: Solve an equation as a fraqtion. Is it possible?
(11-02-2018 08:42 AM)blevita Wrote:  Hi

I would like to solve a simple equation to two variables.
This is obvious a very simple task for the attached example but as you could imagine, i would like to do the same with much more complex equations.

So my question is, is it possible to solve such an equation to a fraqtion which consists of two variables?
I have tried with solve(...,[x/b]) but i got only an empty result.


If the prime is not able to do so, is there any othe tool out there who can do such a algebraic operation?

Thanks

Hi,
you have to use the CAS ambient in order to do that Wink
Best,

Aries Smile
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11-02-2018, 04:24 PM
Post: #4
RE: Solve an equation as a fraqtion. Is it possible?
Thanks for your answers.

But its not what i have searched for ^^.
The problem is, that in my case, the "a"-part is not that simple.

I think i must give you the real example.

This is my equation:
((r1*r3*u2+r2*r3*u1)/(c2*p*r1*r2*r3+r1*r2+r1*r3+r2*r3)) = (-u2*p*c1*r3)

I want to know what u2/u1 is.
Therefore i have tried to do this:

solve(((r1*r3*u2+r2*r3*u1)/(c2*p*r1*r2*r3+r1*r2+r1*r3+r2*r3)) = (-u2*p*c1*r3),[u2/u1])

but it does not work
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11-02-2018, 05:31 PM
Post: #5
RE: Solve an equation as a fraqtion. Is it possible?
(11-02-2018 04:24 PM)blevita Wrote:  Thanks for your answers.

But its not what i have searched for ^^.
The problem is, that in my case, the "a"-part is not that simple.

I think i must give you the real example.

This is my equation:
((r1*r3*u2+r2*r3*u1)/(c2*p*r1*r2*r3+r1*r2+r1*r3+r2*r3)) = (-u2*p*c1*r3)

I want to know what u2/u1 is.
Therefore i have tried to do this:

solve(((r1*r3*u2+r2*r3*u1)/(c2*p*r1*r2*r3+r1*r2+r1*r3+r2*r3)) = (-u2*p*c1*r3),[u2/u1])

but it does not work

I got it … I think the argument has to be a variable name … Wink
Best,

Aries Smile
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11-02-2018, 09:08 PM (This post was last modified: 11-02-2018 09:21 PM by rushfan.)
Post: #6
RE: Solve an equation as a fraqtion. Is it possible?
(11-02-2018 04:24 PM)blevita Wrote:  Thanks for your answers.

But its not what i have searched for ^^.
The problem is, that in my case, the "a"-part is not that simple.

I think i must give you the real example.

This is my equation:
((r1*r3*u2+r2*r3*u1)/(c2*p*r1*r2*r3+r1*r2+r1*r3+r2*r3)) = (-u2*p*c1*r3)

I want to know what u2/u1 is.
Therefore i have tried to do this:

solve(((r1*r3*u2+r2*r3*u1)/(c2*p*r1*r2*r3+r1*r2+r1*r3+r2*r3)) = (-u2*p*c1*r3),[u2/u1])

but it does not work

Try:

Code:
solve(((r1*r3*u2+r2*r3*u1)/(c2*p*r1*r2*r3+r1*r2+r1*r3+r2*r3)) = (-u2*p*c1*r3), u2)
Ans/u1
simplify(Ans)
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11-02-2018, 10:09 PM
Post: #7
RE: Solve an equation as a fraqtion. Is it possible?
(11-02-2018 04:24 PM)blevita Wrote:  Thanks for your answers.

But its not what i have searched for ^^.
The problem is, that in my case, the "a"-part is not that simple.

I think i must give you the real example.

This is my equation:
((r1*r3*u2+r2*r3*u1)/(c2*p*r1*r2*r3+r1*r2+r1*r3+r2*r3)) = (-u2*p*c1*r3)

I want to know what u2/u1 is.
Therefore i have tried to do this:

solve(((r1*r3*u2+r2*r3*u1)/(c2*p*r1*r2*r3+r1*r2+r1*r3+r2*r3)) = (-u2*p*c1*r3),[u2/u1])

but it does not work

Replace u2 with u1*x and solve for x.

— Ian Abbott
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11-02-2018, 10:32 PM
Post: #8
RE: Solve an equation as a fraqtion. Is it possible?
Thank you very much!
I think i got it Smile

I love the HP-Forum.
And i love my HP-Calc.
He is much better than my old TI-NSpire. ^^
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