(adsbygoogle = window.adsbygoogle || []).push({}); logarithms of negative numbers

Some years ago, I read about how to take the natural log of a negative real number but I don't remember the source. I'd to get feedback if this is correct: (::= 'therefore')

Euler's identity: e^(i pi) = -1 :: ln(-1)= i pi, and ln(-a) = ln(a) + i pi ('a' a real number) :: the natural logs of all negative real numbers would lie on a line parallel to the real axis at distance of pi on the i axis. Is this correct?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Logorithms of negative numbers

**Physics Forums | Science Articles, Homework Help, Discussion**