ASKSAGE: Sage Q&A Forum - Latest question feedhttp://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Wed, 18 Mar 2015 04:00:47 -0500Why can Sage solve one log equation, but not another with only different values?http://ask.sagemath.org/question/26237/why-can-sage-solve-one-log-equation-but-not-another-with-only-different-values/ solve(3 == 586 * 0.2 ^ x, x)
[x == log(586/3)/log(5)] // Numerical: 3.27736003989833
solve(3 == 586 * 0.99557 ^ x, x)
[100000^x == 586/3*99557^x] // Wat???
Why is it not capable of solving the second equation?
Math tells us there is a solution and that it is:
log(3/586) / log(0.99557) = 1188.03958878842WoodgnomeWed, 18 Mar 2015 04:00:47 -0500http://ask.sagemath.org/question/26237/Solve log equations problemhttp://ask.sagemath.org/question/8783/solve-log-equations-problem/Input
var('x')
solve((log((x**2 - x), 6) - log((6*x - 10), 6) == 0), x)
Output
[log(x^2 - x) == log(6*x - 10)]
But real roots are 5 and 2. What I doing wrong?TicksyFri, 09 Mar 2012 05:36:53 -0600http://ask.sagemath.org/question/8783/