document.write( "Question 1087182: Find the arithmetic mean of the terms: an–1 = –4; an+1 = –11.
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Algebra.Com's Answer #701456 by ikleyn(52834) $\"\"$ $\"About$

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document.write( "The arithmetic mean of the terms   = -4  and   = -11  is\r\n" );
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document.write( " =  = -7.5.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Same as the arithmetic mean of the two numbers -4 and -11.\r
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