EXPONENTS Review of Introductory MathematicsZeroExponentsUsing the rule for exponents (Rule 4) to evaluate an/an, thenanan1This interpretation is consistent with the rule an/an = an-n = a0. Therefore, a0 = 1 when a is notequal to 0. Any number to the zero power equals one.Example:30 = 1(b2+2)0 = 1NegativeExponentsThe rules for positive exponents apply to negative exponents. a-n is defined as follows:a-n= an1anan1anFor example, a5/a2 = a5 - 2as shown earlier. If is written as a-2, and the rules for1a2multiplication are applied to this, a5 x a-2 = a5-2 = a3. Thus, writing as a-n and applying the1anrules for multiplication yields the same results as and applying the rules of division.1anExamples:c21c2x31x3MA-01 Page 64 Rev. 0
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