For the parametrization 
, find the curvature of the path at 
Definitions:
Optimal Combination
The most efficient allocation or selection of resources and inputs to maximize output or satisfaction.
Isoquant
A curve that shows all the combinations of inputs that produce the same level of output, used in the study of production theory.
Isocost Line
A graph representing all combinations of a firm's inputs that result in the same total cost.
Least Costly
A term referring to an option that incurs the lowest expenses in comparison to alternatives.
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