Hey,

I'm on Maple 16 and looking for some help.

Basically I have a function Psi(x) and I want the function x(Psi).

Here how i define Psi(x) :

psi:=x->(ln(x)-x+k*(1-x)^2+(V*G)/(R*T)*((1-x)^(1/3)-(1-x)/2))*(R*T/V);

The constants R,V,G,T,k are well defined (physicist here).

And then if I try

solve(psi(x)=y,x);

It gives me no solutions with the warning "Warning, solutions may have been lost".

Whereas if I fsolve it for a certain y :