The inverse problem involving determination of the forcing function, d
epending not only on the unknown variable but also the space variable,
is considered. However, the form of the function is assumed to be of
the form f(u) + xg(u) assuming only an affine dependence on the space
variable. The problem considered is defined on a finite space interval
and non-negative time axis. The auxiliary conditions are prescribed a
t the boundaries of the space interval.