# The natural logarithm

#### Topolfractal

Does there exist a closed form formula for in(x)?

#### phion

Gold Member
You can get an arbitrarily good approximation with the Taylor series representation of $ln(x)$ by integrating term by term the sequence form of $1/x$.

#### Mark44

Mentor
Does there exist a closed form formula for in(x)?
Typo? You have in instead of ln (lowercase "ell").

#### Topolfractal

Typo? You have in instead of ln (lowercase "ell").
Ya In(x) is what I mean

#### micromass

Does there exist a closed form formula for in(x)?
What do you mean with closed formula? What functions are you allowed to use?