Use the method of Lagrange multipliers to maximize the function subject to the given constraint.   Maximize the function  f(x, y) = x + 5y − 2xy − x2 − 2y2    subject to the constraint  2x + y = 4.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter10: Inequalities
Section10.8: Systems Of Linear Inequalities
Problem 2E
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Use the method of Lagrange multipliers to maximize the function subject to the given constraint.
 
Maximize the function 
f(x, y) = x + 5y − 2xy − x2 − 2y2
 
 subject to the constraint 
2x + y = 4.
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