Attachment 29740

I've been studying this document for quite a while but I'm finding I'm not understanding yet the boxed formula. I'm trying to find perhaps some examples of video where this might be made more clear?

Thanks in advance...

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- Nov 15th 2013, 07:28 PMsepotoLogarithmic Differentiation. Method 2.
Attachment 29740

I've been studying this document for quite a while but I'm finding I'm not understanding yet the boxed formula. I'm trying to find perhaps some examples of video where this might be made more clear?

Thanks in advance... - Nov 15th 2013, 08:39 PMibduttRe: Logarithmic Differentiation. Method 2.
remember differential of lox x is 1/x; if we have a function in place of x we follow chain rule. e.g.,

differential of log (sin x ) = (1/ sinx ) d( sinx)/dx = cosx / sin x and so on.

differential of log ( x^3 + 3x^2 - 4 ) = [1/ ( x^3 + 3x^2 - 4 ) ] * d( x^3 + 3x^2 - 4 )/dx = [1/ ( x^3 + 3x^2 - 4 ) ] * ( 3x^2 + 6x ) so on.