Anyone can have the idea how to solve the log of a power ser • Physics Forums

flower321 · 2016-08-15T06:25:06+00:00

hi, anyone can have the idea how to solve the log of a power series? i.e. log(1+ Σ_{j=1}^{∞}(1/z^{2 j-1}) f^{j})

Thread 'How does time derivative commute from one variable to another?'

I'm reviewing Meirovitch's "Methods of Analytical Dynamics," and I don't understand the commutation of the derivative from r to dr: $$ \mathbf{F} \cdot d\mathbf{r} = m \ddot{\mathbf{r}} \cdot d\mathbf{r} = m\mathbf{\dot{r}} \cdot d\mathbf{\dot{r}} $$

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A Anyone can have the idea how to solve the log of a power ser

Thread 'How does time derivative commute from one variable to another?'

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