Why 0.04 ? Th notebook says :
S=(5^( x -1) == (0.04)^(2*x)).subs({0.04:1/25}).log().solve(x) ; S
[x == log(5)/(2*log(25) + log(5))]
bool(S[0].rhs()==1/5)
True
(The last step is easily done by mental computation ; this is only a
check.).
HTH,
--
Emmanuel Charpentier
Le dimanche 16 novembre 2014 19:54:20 UTC+1, RRogers a écrit :
>
> Apparently the default solver doesn't do logarithms.
> For the default try:
> solve(log(5^( x -1)) == log((0.04)^(2*x)), x)
>
> [x == 8104022*log(5)/(8104022*log(5) + 52171681)]
>
>
>
>
>
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