The left side of this equation is often called the

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Unformatted text preview: 5.7 ö æ y 4.1 ö y12.3 = ç 4.1 ÷ = ç 4.1 ÷ = ç 5.7 ÷ = 17.1 ç -2.7 ÷ x èx ø èy ø èy ø èx ø 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 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 exponent form. 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...
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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.

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