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document.write( "Instead of doing your problem for you, I will do one EXACTLY IN EVERY\r\n" );
document.write( "DETAIL like yours, so that when you do yours, you can use this as a\r\n" );
document.write( "model.\r\n" );
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document.write( "I will find the sum of this infinite geometric series instead:\r\n" );
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document.write( "
\r\n" );
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document.write( "We should first check to see if it really is a geometric series, for sometimes\r\n" );
document.write( "books contain errors/typos. If it is a geometric series then this must be true:\r\n" );
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document.write( "
\r\n" );
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document.write( "So we calculate the three ratio to see if they are all equal:\r\n" );
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document.write( "
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document.write( "
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document.write( "
\r\n" );
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document.write( "They are all the same so it is a geometric series with common ratio = \r\n" );
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document.write( "It is a geometric series with a defined sum when taken to infinitely many\r\n" );
document.write( "terms because the ratio 
is greater than -1 and less than +1.\r\n" );
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document.write( "
, where a1 = 1st term = 
\r\n" );
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document.write( "
\r\n" );
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document.write( "Answer to this problem = 
\r\n" );
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document.write( "Now do your problem EXACTLY the same way.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
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document.write( "![\"\"](\"/images/stars/stars-12.gif\")
