\
Substitute 2.3026 for
f
( 3 ) and 0.69315 for
f
( 1 ).
\
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dea770b983a75bf157e1666f0c6970eb.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a8dd655b8f2af5274106e64cb2865596.png\")