In a mathematical formulation of an optimization problem, the objective function is written as z=2x₁+3x₂. Then: A) x₁ is a decision variable B) x₂ is a parameter C) z needs to be maximized D) 2 is a first decision variable level

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x₁ is a decision variable because it is one of the variables that can be controlled to optimize the objective function.

In a Mathematical Formulation of an Optimization Problem, the Objective