Natural Logarithms:
We described the logarithmic function y = loga x with base a. If a = 10, then y is known as common logarithm of the number x. If a = e, we can describe the logarithm of x to the base e as
Logarithms to the base e are known as natural logarithms. It is normal to write log, x as log x. We remind that
log 1 = 0, log e = 1, elogx = x and log (e)x = x