A REVIEW OF LOGARITHMS

Equivalence

Before you choose a topic from the list, let's review what you know about the word "equivalent." You will come across this word in all your math courses. According to Webster, the word "equivalent" means to have equal value, equal amount, equal measure, equal area, equal length, etc. You get the picture.
For example, 1 yard is equivalent to 3 feet because both represent the same measure. You will see the notation 1 yard = 3 feet. Obviously, the left side of the = sign is not identical to the right side. The numbers and the words are different. However, the left side is equivalent to the right side because both sides denote the same length. In this case, the = sign is used to denote equivalence.
Suppose you wish to purchase an item for tex2html_wrap_inline11, you could pay for it with a dollar bill and 2 dimes, you could pay for it with 12 dimes, you could pay it for 4 quarters and 4 nickels, etc. If you put each method of payment in a separate pile, you will note that they do not look the same. They are in fact not identical. However, they are equivalent because all the methods of payment total tex2html_wrap_inline11.

The number 1 has many equivalent faces:

displaymath36

to name a few. The number 0 has many equivalent faces:

displaymath38

to name a few.

Exponential Shortcuts

Exponents represent shortcuts in multiplication.

Example 1: The expression tex2html_wrap_inline40 can be written tex2html_wrap_inline42 .

Example 2: The expression tex2html_wrap_inline44 means tex2html_wrap_inline46 .

Example 3: The expression tex2html_wrap_inline48 can be written tex2html_wrap_inline50 .

Example 4: The expression (-7)(-7)(-7)(-7) can be written tex2html_wrap_inline54 .

You would much rather write the expression tex2html_wrap_inline56 than write out 8 one thousand times. You can also use exponents with variables.

Example 5: The expression (a+b)(a+b)(a+b)(a+b)(a+b) is more conveniently written as tex2html_wrap_inline60 .

If you want to review the rules for exponents, click on Exponential Rules.

[Exponential Rules] [Logarithms]

[Algebra] [Trigonometry ] [Complex Variables]

S.O.S MATHematics home page

Do you need more help? Please post your question on our S.O.S. Mathematics CyberBoard.

Author: Nancy Marcus

Copyright 1999-2017 MathMedics, LLC. All rights reserved.
Contact us
Math Medics, LLC. - P.O. Box 12395 - El Paso TX 79913 - USA
users online during the last hour