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aceace
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The sum of two numbers is 20. Find the numbers and their product if their product is a maximum.
 one year ago
 one year ago
aceace Group Title
The sum of two numbers is 20. Find the numbers and their product if their product is a maximum.
 one year ago
 one year ago

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BAdhi Group TitleBest ResponseYou've already chosen the best response.1
x+y=20 C=xy =x(20x) =20xx^2 if you know calculus, dC/dx=202x=0 x=10 (when maximum) y=10 if not, C=(x10)^2+100 C becomes maximum when x=10 ((x10)^2>0) x=10 when maximum y=10
 one year ago

aceace Group TitleBest ResponseYou've already chosen the best response.0
thanks i get it... i'll do it the noncalculus way XD
 one year ago
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