unbounded
problem

Model,
which mathematical formulation is as follows: _{}

The
intersection of feasible regions of both variables is unlimited. The iso-profit
line can be shifted to the right with no limits. The optimal solution is
unbounded. The only help in such a case is to add constrain, to find some limit or demand. This finding is very
likely to be successful because no real process is without limit.

The
feasible area for the first constrain was drawn using points A(0;1) and B(4;0)
,

for second
constrain points C(0;2) and D(4;4).