# Math Help - solving for f

1. ## solving for f

the problem is x=(f)log(f) and i have to solve for f.....any ideas...i've hit about 10 road blacks haha

2. ## I'd say

use the fact of logarithmic rules so that it now reads $x=\ln(f^{f})$ then...go $e^{x}=f^{f}$ then use the lambert-W function as was posted in your other trhead

3. Originally Posted by JesseHackett
the problem is x=(f)log(f) and i have to solve for f.....any ideas...i've hit about 10 road blacks haha
how about using the Lambert W Function?

$x = f \ln f$

$\Rightarrow x = \ln f^f$

$\Rightarrow e^x = f^f$

now see post #3 here