given that show that

i have

did i differenciate the RHS correctly.. that is

differentiating it again i have

now rewriting

i cant get that to look like

did i do something wrong in the process.

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- April 9th 2010, 08:57 AMsigma1proving differential
given that show that

i have

did i differenciate the RHS correctly.. that is

differentiating it again i have

now rewriting

i cant get that to look like

did i do something wrong in the process. - April 9th 2010, 09:38 AMdwsmith

I am not going to simplify because I am lazy. You can check to see if it works and your math is the same.

*I made a correction I used by accident at first. - April 9th 2010, 09:49 AMsigma1
am trying to follow what your doing but am a bit confused can you explain your steps and bit and show me what your getting at.. did you make y the subject for your first line... in that case shouldnt it be for the denominator

- April 9th 2010, 09:52 AMdwsmith
I used x cubed by accident at first but I edited my original post to fix it.

I just solved for y and took the first and second derivative. - April 9th 2010, 12:23 PMsigma1
i have been trying to simplify the equation but it has been giving me some problems. i would like to see how you would do it if its not too much of a problem.

- April 9th 2010, 10:35 PMCaptainBlack