Trivial solution in cutting plane exercise

[ivanightingale]

The cutting plane exercise in the modeling exercise notebook in the background materials has a trivial solution m=0, c=0:

LearningToControlClass/class01/background_materials/optimization_basics.jl

Line 224 in 9dce1fc

**Example** -- Cutting-plane Exercise – Approximating a Circular Constraint with Linear Cuts

Maybe the problem can be modified so that the solution is not trivial?

[andrewrosemberg]

Changed, thank you!