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S
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How to find two positive x and y that minimize Q=x^2y if x+y+2 ?
 2 years ago
 2 years ago
S Group Title
How to find two positive x and y that minimize Q=x^2y if x+y+2 ?
 2 years ago
 2 years ago

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Brutal Group TitleBest ResponseYou've already chosen the best response.0
did u mean x+y=2?
 2 years ago

S Group TitleBest ResponseYou've already chosen the best response.2
oh, yes, sorry x+y=2
 2 years ago

Brutal Group TitleBest ResponseYou've already chosen the best response.0
x+y = 2 y = 2x Q=(x^2)*y = x^2(2x) = 2x^2x^3 Q' = 4x  3x^2 = 0 x(43x)=0 x=0; 43x=0, 3x=4; x=4/3
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.1
@S did you leave? Because it looks like @Brutal was putting in some time to help you here...
 2 years ago

S Group TitleBest ResponseYou've already chosen the best response.2
no , i am steel here, just trying to understand this
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.1
Cool, no worries then  as you were ;)
 2 years ago

Brutal Group TitleBest ResponseYou've already chosen the best response.0
okay just keep the positive positive value: x=4/3 x=4/3, but you know that y = 2 x, so y = 2(4/3) = (64)/3 = 2/3
 2 years ago

S Group TitleBest ResponseYou've already chosen the best response.2
yes, was just thinking about y value =D, thank you soo much for your help!
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.1
Great job both of you @S and @Brutal. Thank you from OpenStudy!
 2 years ago
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