Math Chapter Wise Linear Programming Problems English MCQ UKPSC Lecturer (Mains) 2020 Q.Which of the following is not true? Ax x e (E 1)e ∆ = − B()() 1 1 1 0 +∆ −∇ + = CE 1 = ∆+ D1 E 1 − ∇+ = Show answer Correct answer: ()() 1 1 1 0 +∆ −∇ + =