The exponential statement is .
Definition of logarithmic functions : if and only if .
Therefore is equal to .
.
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if and only if ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=50d18dc3a172be0d85aa9a8925fbacca.png\")
. is equal to ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6ae16c28f69f844a59d8a6dacd2107d6.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
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.