document.write( "Question 1054498: Find the value of the following summation:
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Algebra.Com's Answer #669695 by Edwin McCravy(20056)  
You can put this solution on YOUR website!
 Find the value of the following summation:\r\n" );
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document.write( "We write out the first few terms, and the last term:\r\n" );
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document.write( "[2(15)-5] + [2(16)-5)] + [2(17)-5] + [2(18)-5] + ... + [2(47)-5}\r\n" );
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document.write( "[30-5] + [32-5] + [34-5] + [36-5] + ... + [94-5]\r\n" );
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document.write( "25 + 27 + 29 + 31 + ... + 89\r\n" );
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document.write( "We see this is an arithmetic series, with a₁ = 25,\r\n" );
document.write( "d = 2, and a_n = 89\r\n" );
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document.write( "We first use the nth term formula to find n:\r\n" );
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document.write( "Then we use the sum formula:\r\n" );
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document.write( "Answer: 1881\r\n" );
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document.write( "Edwin
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