INTRODUCTION(KEVIN)

= INTRODUCTION: = = = = WELCOME TO LOGARITHMS, HERE IS WHAT YOU NEED TO KNOW: =

DEFINITION OF LOGARITHM:

 * == a & x are positive #'s, a cannot = 1. The logarithm of X with base a is denoted by log a (X). ==
 * == log a (X) = y & a^y = X ==

2. Logarithm with a base of 10 ---> Common Logarithmic Function. ---> Evaluated by the LOG key.

 * == log(100) = 2 ---> 10^2 = 100 ==

3.) Logarithms with a base of e ---> Natural Logarithm. ---> Evaluated by the LN key.

 * == ln(X) = y ---> e^y = X ==

4.) Change of Base Formula can rewrite a logarithm in terms of a base 10 logarithm.

 * ==log a (X) = log(X) / log(a)==
 * ==Example : log 2 (6) = log(6) / log(2) = 0.778/0.301 = 2.585==

PROPERTIES OF LOGARITHMS:

 * == log a (U*V) = log a (U) + log a (V) ==
 * == log a (U / V) = log a (U) - log a (V) ==
 * == log a (U^n) = n log a (U) ==