RADICALS Review of Introductory MathematicsRADICALSThis chapter covers the addition, subtraction, multiplication, and division ofradicals.EO 1.15 CALCULATE the numerical value of numbers inradical form.CalculatorUsage,SpecialKeysThe exponent key can be used for radicals if the exponent is entered in decimal form.Exponent keyRaising a number to an exponent requires the yx key to be pressed twice. First,the base number is entered and the yx key is pressed. This enters the base number(y). Next, the exponent number is entered and the yx key is pressed. This entersthe exponent and tells the calculator to complete the calculation. The calculatorwill display the value.Square-root keyPressing this key takes the square root of the displayed number.TheRadicalA previous chapter explained how to raise a number to a power. The inverse of this operationis called extracting a root. For any positive integer n, a number x is the nth root of the numbera if it satisfies xn= a. For example, since 25= 32, 2 is the fifth root of 32.To indicate the nth root of a, the expressiona1/nis often used. The symbol is called theradical sign, and the nth root of a can also be shown as . The letter a is the radicand, andnan is the index. The index 2 is generally omitted for square roots.Example:423273MA-01 Page 74 Rev. 0
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