document.write( "Question 959558: Can you find the sum of the first 60 terms in the series 2+6+4+12+6+24 \n" ); document.write( "

Algebra.Com's Answer #586577 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "Break the 60 term series up into the sum of the 30 term \r\n" );
document.write( "series of odd numbered terms and the 30 term series of the\r\n" );
document.write( "even numbered terms.  That is\r\n" );
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document.write( "2+6+4+12+6+24+... = 2+4+6+... +6+12+24+... \r\n" );
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document.write( "The first series is arithmetic and the second one is geometric:\r\n" );
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document.write( "to find the sum of 2+4+6+... to 30 terms we use the formula:\r\n" );
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document.write( ", where , , and \r\n" );
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document.write( "To find the sum of 6+12+24+... to 30 terms we use the formula:\r\n" );
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document.write( ", where , , and \r\n" );
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document.write( "----------------\r\n" );
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document.write( "The sum of the two sequences is  930+6442450938 = 6442451868\r\n" );
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document.write( "Edwin

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