Function notation minus one exponent?

[bangthatdrum]

Hi !

What does the notation mean exactly when a function has power minus one ?

For example i have seen the logistic function written as:

f(x) = f0[1 + exp(−βx)]^-1

 

[gb7nash]

$$z^{-1} = \frac{1}{z}$$

For instance:

$$2^{-1} = \frac{1}{2}$$

Applying this to your problem...

 

[bangthatdrum]

oh ok, thanks 4 the help.