Category:Newton-Mercator Series

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This category contains results about Newton-Mercator Series.
Definitions specific to this category can be found in Definitions/Newton-Mercator Series.


Let $\ln x$ denote the natural logarithm function.

Then:

\(\ds \map \ln {1 + x}\) \(=\) \(\ds x - \dfrac {x^2} 2 + \dfrac {x^3} 3 - \dfrac {x^4} 4 + \cdots\)
\(\ds \) \(=\) \(\ds \sum_{n \mathop = 1}^\infty \frac {\paren {-1}^{n + 1} } n x^n\)

The series converges to the natural logarithm (shifted by $1$) for $-1 < x \le 1$.


This is known as the Newton-Mercator series.