log(x) vs log(z)

http://dmentrard.free.fr/GEOGEBRA/Maths/logxlogzMD.html
[url=http://dmentrard.free.fr/GEOGEBRA/Maths/logxlogzMD.html]http://dmentrard.free.fr/GEOGEBRA/Maths/logxlogzMD.html[/url]
– Daniel Mentrard

Information: log(x) vs log(z)