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anonymous
 2 years ago
help with optimization! (attached)
anonymous
 2 years ago
help with optimization! (attached)

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anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0okay i understand everything..... except how to find the minimum!

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0are you familiar with derivative?

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0i know they got the equation. y=6x+(21000/x)

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0then after i'm not sure how they got: Minimum occurs at 59.16 ft for the length (found on a graphing calc) width: 10500/59.16 = 177.5 ft Perimeter = 710 ft

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0ok, well the method they got the minimum is just by using a graphing calculator with a max min function on it doing it manually would involve finding the first derivative of the equation and then setting it equal to zero and then solving for L

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0is there a way to do that without it?

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0without the graphing calculator? or without having to do it manually?

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0by hand would involve finding the first derivative of the equation and then setting it equal to zero and then solving for L

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0because the slope at the minimum point is zero

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0im doing it wrong, even on calculator :/ I'm not getting it.

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0\[y = \frac{21000}{x} + 6x\] \[y' = \frac{21000}{x^2} +6\] \[y' =0\] \[0=\frac{21000}{x^2} +6\] solve for x hopefully i didnt screw up the derivative

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0\[\frac{1}{x} = x^{1}\]

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0@completeidiot derivative is fine :3

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0im just pointing out the identity that allows you to use the "power" rule for derivatives

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0\[y= x^n\] \[y' = nx^{n1}\]

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0im not getting that. i got up to here: y=621000/x^2 then set it to 0

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.01/x is not part of the problem you can ignore it if you want its just that the identity is sometimes not obvious to other people

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0once you set it equal to zero 0=621000/x^2 just solve for x

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.06= 21000/x^2 x^2= 21000/6 x = sqrt {21000/6}

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0any other questions? sorry for any confusion i may have caused
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