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From: | Mark Clements |
Subject: | [Axiom-mail] Easy Problem. Can this be done in Maxima/Axiom? |
Date: | Tue, 17 Nov 2009 16:22:11 +1100 |
The following problem came up on the Maxima mail-list (translated here into Axiom):
-- solve for x (over the Reals?)
ex := (3/7)^(4*x-5)*(7/3)^(2*x-7)=1
I came up with several overly long solutions (using Fricas 1.0.3):
rule1 := (rule log(7/3)==-log(3/7))
rule1 rhs solve(map(expandLog,map(log,ex)), x).1
-- or, similarly
rule1 rhs solve(expandLog log lhs ex, x).1
rule2 := rule((a/b)^c*(b/a)^d==(a/b)^(c-d))
solve((rule2 lhs ex)=(rhs ex),x)
Can anyone come up with a better solution?
Kindly, Mark Clements.
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