Unformatted text preview: 5.7 ö
æ y 4.1 ö
= ç 4.1 ÷ = ç 4.1 ÷ = ç 5.7 ÷ = 17.1
ç -2.7 ÷
Note that we won’t be doing anything like this in the remainder of this course. This section is
here only to acknowledge that these rules will work for any kind of exponent that we might need
to work with. © 2007 Paul Dawkins 15 http://tutorial.math.lamar.edu/terms.aspx College Algebra Radicals
We’ll open this section with the definition of the radical. If n is a positive integer that is greater
than 1 and a is a real number then,
n a =a 1
n where n is called the index, a is called the radicand, and the symbol
is called the radical.
The left side of this equation is often called the radical form and the right side is often called the
From this definition we can see that a radical is simply another notation for the first rational
exponent that we looked at in the rational exponents section.
Note as well that the index is required in these to make sure that we correctly evaluate the radical.
There is one exception...
View Full Document
This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.
- Spring '12