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Questions › DSE › DSE 2007 › Q49
2 marksMathematics › Constrained optimisation and linear programming › Equality-constrained optimisation and Lagrange multipliersModerateabout 3 min

DSE 2007 Question 49: Constrained optimisation and linear programming

What is the maximum value of the function z=xyz=xyz=xy subject to the constraints x>0x>0x>0, y>0y>0y>0, and 2x+y=62x+y=62x+y=6?

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What is the maximum value of the function z=xy subject to the constraints x>0, y>0, and 2x+y=6? (A) 2.5 (B) 4 (C) 4.5 (D) 9

Constrained optimisation and linear programming has come up 44 times in 7 exams since 2007.

What this question tests

This question is on Equality-constrained optimisation and Lagrange multipliers, part of Constrained optimisation and linear programming in Mathematics.

Optimising a function subject to equality constraints, and what the multiplier means.

TestStop has 14 past-paper questions on this subtopic.

Practise Constrained optimisation and linear programmingMore on Equality-constrained optimisation and Lagrange multipliers

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Question from the DSE 2007 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.