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anonymous
 3 years ago
Calculus help!
anonymous
 3 years ago
Calculus help!

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raxis
 3 years ago
Best ResponseYou've already chosen the best response.0Where's the question? ^^;

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0The derivative of \[ f(x)=\frac{ x ^{4} }{ 3 }\frac{ x ^{5} }{ 5 }\] attains its maximum value at x=?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0I found the derivative, and set it equal to zero, but 1 was not one of the values i got... :(

zepdrix
 3 years ago
Best ResponseYou've already chosen the best response.0Ya the answer key is incorrect, it appears to have a max at \(x=\dfrac{4}{3}\). I keep getting x=3/4 when I work it out though, so I gotta figure out where my mistake is.

zepdrix
 3 years ago
Best ResponseYou've already chosen the best response.0OH the problem was probably SUPPOSE TO BE,\[\large f(x)=\frac{x^4}{\color{salmon}4}\frac{x^5}{5}\]

zepdrix
 3 years ago
Best ResponseYou've already chosen the best response.0Because that clearly gives a critical point at x=1

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0ohh if you do it like that, do you get the right answer? ohh ok :pgoshh these problems :(

zepdrix
 3 years ago
Best ResponseYou've already chosen the best response.0Oh yah it's x=4/3. I see where my mistake was :O Were you able to get that value?

zepdrix
 3 years ago
Best ResponseYou've already chosen the best response.0yah looks like teacher made silly mistake c: that happens
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