document.write( "Question 179643: Explain a process for finding a limit
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\n" ); document.write( "Write a concise description of the meaning of lim f(x)=10 as x approaches to 3
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\n" ); document.write( "Examine the continuity of g(x) = x+3 and the point x=2.
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Algebra.Com's Answer #134592 by Edwin McCravy(20055)\"\" \"About 
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Explain a process for finding a limit
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\n" ); document.write( "Write a concise description of the meaning of lim f(x)=10 as x approaches to 3
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document.write( "means, colloqually, for any required degree of tolerance\r\n" );
document.write( "\"epsilon\", (a positive number usually thought of as very small)\r\n" );
document.write( "there exists another positive number \"delta\" (also usually thought \r\n" );
document.write( "of as very small) such that whenever x is less than \"delta\" units \r\n" );
document.write( "away from \"3\", \"f%28x%29\" will always be less than \"epsilon\" units away from \"10\".\r\n" );
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document.write( "To write it concisely,\r\n" );
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document.write( "For any \"matrix%281%2C3%2Cepsilon%2C+%22%3E%22%2C+0%29\", there exists a \r\n" );
document.write( "\"matrix%281%2C3%2Cdelta%2C+%22%3E%22%2C+0%29\"  such that \"matrix%281%2C3%2Cabs%28f%28x%29-10%29%2C+%22%3C%22%2C+epsilon%29\" whenever \"matrix%281%2C5%2C0%2C+%22%3C%22%2C+abs%28x-3%29%2C+%22%3C%22%2C+delta%29\".\r\n" );
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\n" ); document.write( "Examine the continuity of g(x) = x+3 and the point x=2.
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document.write( "\"g%28x%29\" will be continuous at \"x=2\" if \"g%282%29=2%2B3=5\" and\r\n" );
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document.write( "       \r\n" );
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document.write( "Suppose we have any required tolerance, \"epsilon%3E0\". Then\r\n" );
document.write( "we need to find a \"delta%3E0\" such that if \"0%3Cabs%28x-2%29%3Cdelta\",\r\n" );
document.write( "then \"abs%28g%28x%29-5%29%3Cepsilon\".\r\n" );
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document.write( "\"abs%28g%28x%29-5%29%3Cepsilon\" if and only if\r\n" );
document.write( "\"abs%28%28x%2B3%29-5%29%3Cepsilon\" if and only if\r\n" );
document.write( "\"abs%28x%2B3-5%29%3Cepsilon\" if and only if\r\n" );
document.write( "\"abs%28x-2%29%3Cepsilon\"\r\n" );
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document.write( "So we simply take any \"d\" such that \r\n" );
document.write( "\"delta%3Cepsilon\" and then turn the above \r\n" );
document.write( "backwards and we have:\r\n" );
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document.write( "\"abs%28x-2%29%3Cdelta\" => \"abs%28x-2%29%3Cepsilon\" =>\r\n" );
document.write( "\"abs%28x%2B3-5%29%3Cepsilon\" => \"abs%28g%28x%29-5%29%3Cepsilon\"\r\n" );
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document.write( "Edwin
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