document.write( "Question 1208897: For 0 < a < b, let h be defined by\r
\n" ); document.write( "\n" ); document.write( "1/h = (1/2)[(1/a) + (1/b)].\r
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\n" ); document.write( "\n" ); document.write( "Note: The number h is called the harmonic mean of a and b.\r
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Algebra.Com's Answer #847414 by Edwin McCravy(20060) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "add a to all three parts\r\n" );
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document.write( "divide all three parts by 2ab\r\n" );
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document.write( "add b to all three parts\r\n" );
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document.write( "divide all three parts by 2ab\r\n" );
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document.write( "Put these two together:\r\n" );
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document.write( " and \r\n" );
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document.write( "Ignoring the first parts of each:\r\n" );
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document.write( "We use the fact that if  then \r\n" );
document.write( "I'll prove that if you need it.  But I'll use it here\r\n" );
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document.write( "So that applies above and we have\r\n" );
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document.write( "And since at the top we showed \r\n" );
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document.write( "So  \r\n" );
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document.write( "Edwin

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