Hi, I'm trying to derivate this function : . I'm applying this principle : if then . So there I go :

Now I derivate :

But the book says that's not right and the answer should be :

Does anyone see when I went wrong ? Thanks a lot ...

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- Nov 18th 2009, 07:57 PMBacteriusSquare root derivative
Hi, I'm trying to derivate this function : . I'm applying this principle : if then . So there I go :

Now I derivate :

But the book says that's not right and the answer should be :

Does anyone see when I went wrong ? Thanks a lot ... - Nov 19th 2009, 12:15 AMearboth
- Nov 23rd 2009, 09:42 PMBacterius
Thanks a lot ! (Happy)