ok...thanks
but is it possible get sqrt(7)/7 from n=1/sqrt(7)?
.............
n:1/sqrt(7);
rat(n),algebraic; --->gives /R/ sqrt(7)/7
ratdisrep(rat(n)), algebraic; --> should it be sqrt(7)/7? It gives 1/sqrt(7)!
ratsimp(n),algebraic; --> It gives 1/sqrt(7)
..............
ratsimp (with algebraic) sometimes makes nothing:
ratsimp(1/sqrt(1-x^2)),algebraic; ---> gives -sqrt(1-x^2)/(x^2-1) (ok)
ratsimp(1/sqrt(1+x^2)),algebraic; --> gives 1/sqrt(x^2+1) (the same)
thanks
Date: Fri, 20 Dec 2013 17:08:02 -0500
Subject: Re: [Maxima] Rationalisation (very basic)
From: macrakis at alum.mit.edu
To: rcrdjf at hotmail.com
CC: maxima at math.utexas.edu
ratsimp(n) with algebraic:true also works.
On Fri, Dec 20, 2013 at 5:05 PM, Stavros Macrakis <macrakis at alum.mit.edu> wrote:
Yes, "algebraic" only works in the CRE package, so block([algebraic:true],ratdisrep(rat(n))) is what you want if you want a general representation result, as you say. Is there some problem you're having with that approach?
-s
On Fri, Dec 20, 2013 at 3:50 PM, Ricardo JF <rcrdjf at hotmail.com> wrote:
how can i get the Rationalisation (general expression)?
1/sqrt(7) --> sqrt(7)/7
...........................
n:1/sqrt(7);
rat(n),algebraic; (CRE) ok
ratdisrep(rat(n)), algebraic; (general expression)?
...........................
thanks.
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