Step 1:
The logarithmic statement is
Definition of logarithmic functions if and only if .
Solution:
equivalent statement is .
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![\"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\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=94db18acc6501882168d30ede74d14ce.png\")
.