document.write( "Question 1028777: What is the arithmetic mean an of the given terms
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Algebra.Com's Answer #643942 by ikleyn(52794) $\"\"$ $\"About$

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\n" ); document.write( "What is the arithmetic mean an of the given terms
\n" ); document.write( "An-1=4,an+1=12
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document.write( "According to this article of Wikipedia\r\n" );
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document.write( "   In mathematics and statistics, the arithmetic mean, or simply the mean or average when the context is clear, \r\n" );
document.write( "   is the sum of a collection of numbers divided by the number of numbers in the collection.\r\n" );
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document.write( "Based on this, the arithmetic mean in your case is  =  = 8.\r\n" );
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