Logaritme natural: diferència entre les revisions

:<math>{\rm per}\quad \left|x-1\right| \leq 1\quad {\rm \mbox{ tret que}}\quad x = 0.</math><ref>[http://www.math2.org/math/expansion/log.htm "Logarithmic Expansions" at Math2.org]</ref>

 

 

:<math>\ln{x \over {x-1}} = \sum_{n=1}^\infty {1 \over {n x^n}} = {1 \over x}+ {1 \over {2x^2}} + {1 \over {3x^3}} + \cdots</math>