Optimization Example 4
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Uploader Comments (khanacademy)
Top Comments
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why is this shit soo easy when people explain it?!?!? fuck... but thanks man... very welll done
2 years ago 23
All Comments (43)
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It would have helped more if you took the second derivative.
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Number 14 in my textbook!! YES.
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THX
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You sir have saved my life! Thank You haha
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I didn't know you could do that with Google lol
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Don't you need to plug back in the x to the cost equation to completely answer the question of the cheapest COST? resulting in $163.54 ?
5 months ago 4
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Yr amazing
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Sometimes it's Fun! (Tony Montana voice)
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@rubberduckypwn The exponent comes out front and you lower the power by 1.
e.g. d\dx x^3 = 3x^2 and likewise d\dx x^(-3) = -3x^(-4)
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Had this exact problem on Webassign. The Final answer is: $163.54
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Exponents take precendence over multiplication so 5x^-2 = 5(x^-2) = 5/(x^2), not (5x)^-2
khanacademy 3 years ago 5
so I'm right??!!
GoldAK47 3 years ago
no. It is correct as done in the video
khanacademy 3 years ago 28