document.write( "Question 720811: Find the sum of the first 60 terms of the arithmetic sequence 14, 19, 24, 29..... \n" ); document.write( "
Algebra.Com's Answer #441985 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "a2 - a1 = 19 - 14 = 5\r\n" );
document.write( "a3 - a2 = 24 - 19 = 5\r\n" );
document.write( "a4 - a3 = 29 - 24 = 5\r\n" );
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document.write( "Therefore the common difference d = 5\r\n" );
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document.write( "Sn = \"n%2F2\"[2a1 + (n-1)d]\r\n" );
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document.write( "S60 = \"60%2F2\"[2(14) + (60-1)5]\r\n" );
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document.write( "S60 = 30[28 + (59)5]\r\n" );
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document.write( "S60 = 30[28 + 295]\r\n" );
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document.write( "S60 = 30[323]\r\n" );
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document.write( "S60 = 9690\r\n" );
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document.write( "Edwin
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