Let x₁ and x₂ be 0-1 variables whose values indicate whether projects 1 and 2 are not done or are done. Which answer below indicates that project 2 can be done only if project 1 is done? A)x₁ + x₂ = 1 B)x₁ + x₂ = 2 C)x₁ -x₂ $\le$ 0 D)x₁ -x₂ $\ge$ 0

Question

Quizplus · Accepted Answer

The condition for project 2 to be done only if project 1 is done can be represented as x₁ = 1 and x₂ ≤ x₁. This can be rewritten as x₁ - x₂ ≥ 0. Therefore, option D is the correct choice where x₁ F1F1F1S1F1F1F10 x₂ F1F1F1S1F1F1F10 0 represents the required condition.

Let X1 and X2 Be 0-1 Variables Whose Values Indicate ≤\le≤

Let X₁ and X₂ Be 0-1 Variables Whose Values Indicate $\le$