Please, what woudl be the derivative of a function? I foudn sth like: is that ok???
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Originally Posted by Boo Please, what woudl be the derivative of a function? I foudn sth like: find If is a non-zero constant then
Hello! I ment, if a = function! some tol dme it is different!!!
Yep, that is different.
Yes, that is exactly what i ment!! Do we "add" lnx in that formula or is that a typo? Many thans! I ment, is the original or
Last edited by Boo; February 4th 2013 at 11:34 PM.
Originally Posted by Boo Please, what woudl be the derivative of a function? I foudn sth like: is that ok??? Logarithmic differentiation works well here...
Originally Posted by Boo Yes, that is exactly what i ment!! Do we "add" lnx in that formula or is that a typo? Many thans! I ment, is the original or There is no typo. lnx is in the formula, but it is not added but multiplied. I guess I could also write it as:
got it!!! many many thanks!!!
Last edited by Boo; February 5th 2013 at 01:35 AM.
Originally Posted by Boo Yes, I see! How did U get the first line, sorry, I really forgot... Many thanks¨!!! It follows from the calculation rules for logarithm and exponentials. Suppose , then: by definition.If we substitute q, we get:[1] We also have the rule:[2] So to make that first step more explicit. Using [1] we have: And using [2] we have:
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