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

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Brutal
 3 years ago
Best ResponseYou've already chosen the best response.0x+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

cshalvey
 3 years ago
Best 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...

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

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

Brutal
 3 years ago
Best ResponseYou've already chosen the best response.0okay 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

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

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