The logarithmic statement is .
Definition of logarithmic functions if and only if .
Therefore is equal to .
.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=30579db2f79c3914328b0d7d0d9290f5.png\")
.![\"y](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=c28083d6893a3321d229a5f677cf9bda.png\")
if and only if ![\"x](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=379ef36f03701a5b35a25633e596c351.png\")
. is equal to ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3bfa92a5c8aafa07a72f3d7124da89ca.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=94db18acc6501882168d30ede74d14ce.png\")
.