**math jokes 4 mathy folks**

live. laugh. learn.

:: Miscellany

This form can be used to calculate any of the three terms in a logarithmic expression.

**log**or

_{b}a = x**b**

^{x}= aEnter two of the three values a, b or x, and the third will be calculated.

Most people think that a **logarithm** is just a misspelled **algorithm**.

But logarithms are neat and useful. For instance, the geometric mean of two numbers is equal to the arithmetic mean of the logarithms for those same two numbers. Yeah, that's a mouthful, so here's an example. Notice that…

**10**and

^{2}= 100**10**

^{3}= 1000The geometric mean of 100 and 1000 is 316.228, and the arithmetic mean of 2 and 3 is 2.5. Consequently,

**10**

^{2.5}≈ 316.228Pretty cool, huh?