# Introduction to College Algebra

May 29th, 2015
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Exponents-The exponent of a number says how many times to use the number in a multiplication. In 82 the "2" says to use 8 twice in a multiplication, so 82 = 8 × 8 = 64 Some more examples: Example: 53 = 5 × 5 × 5 = 125

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Introduction to College AlgebraExponentsTheexponentof a number sayshow many timesto use the number in a multiplication.In82the "2" says to use 8 twice in a multiplication,so82= 8 8 = 64Some more examples:Example:53= 5 5 5 = 125In words: 53could be called "5 to the third power", "5 to the power 3" or simply "5 cubed"Example:24= 2 2 2 2 = 16In words: 24could be called "2 to the fourth power" or "2 to the power 4" or simply "2 to the 4th"Exponents make it easier to write and use many multiplicationsExample:96is easier to write and read than9 9 9 9 9 9GeneralSo,in general:antells you to multiplyaby itself,so there arenof thosea's:Other Way of Writing ItSometimes people use the^symbol (just above the 6 on your keyboard), because it is easy to type.Example:2^4 is the sam

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