Natural Logarithm Examples Lesson Summary Frequently Asked Questions What is natural logarithm used for? The number e is used is many different ways in mathematics. It is especially useful when you have a continuous change in rate, like a radioactive isotope decaying or a loan with continuously...
. The number e is is used in exponential and logarithm functions as a base. In exponential functions, e is used in the natural function {eq}y=e^x. {/eq} In logarithms, e is the base of the natural log which can be written two ways: {eq}y=log_{e}x {/eq} or {eq}y=ln(x...