How do you get rid of an exponent in an equation? A logarithm is the inverse of an exponent. How can I recognize one? @PeterS Yes that's exactly right. Natural logarithm rules and properties e is a mathematical constant approximately equal to 2.71828. e^x is a special type of exponential function called the (natural) exponential functionTo solve a natural exponential equation, we use the properties of exponents to isolate the (natural) exponential functions. puting log(-.75) in the calculator? You can still apply the same process used in the previous example, but this equation highlights a couple of rules you must follow. Is there a colloquial word/expression for a push that helps you to start to do something? The power is called the argument of the logarithm. The first just crosses out the exponent, while the second also places the replacement power in small text above the cancellation. 1 As for every code snippet, this is only lightly tested and may break in unpredictable ways. Each rule shows how to solve different types of math equations and how to add, subtract, multiply and divide exponents. Order of Operations Factors & Primes Fractions Long Arithmetic Decimals Exponents & Radicals Ratios & Proportions . Sometimes youll have to do some work to isolate the term containing the exponent first before applying the power rule. If you really do want to continue using siunitx, you can try and use some kerning to put the \cancel in the right place. More generally, you could say exponentials are injective, so this reasoning can be applied to bases $0