document.write( "Question 431805: Find the arithmetic mean an of the given terms
\n" ); document.write( "An-1=100, an+1=140
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Algebra.Com's Answer #299563 by shree840(260)\"\" \"About 
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I presume An is the arithmetic mean
\n" ); document.write( "an-1=100 an=101
\n" ); document.write( "an+1=140 an=139\r
\n" ); document.write( "\n" ); document.write( "question is not clear ANS
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