# Revision history [back]

The solve command looks for an analytic solution. In this case, the solution will involve the Lambert W function, lambert_w. For some reason, though, Sage is not finding it. (You need to use to_poly_solve=True in the solve command, but Sage is encountering an error.)

To find approximations of the solutions, you can use find_root.

For example,

find_root(-V+exp(V)-0.5*V-1,-1,0.5)


and

find_root(-V+exp(V)-0.5*V-1,0.5,1)


give the two roots.