document.write( "Question 1197721: Find the sum of the series: 18/12 + 18/20 + 18/30 + 18/42 + ... + 18/1260. \n" ); document.write( "
Algebra.Com's Answer #831107 by greenestamps(13200)\"\" \"About 
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document.write( "18/12 + 18/20 + 18/30 + ... + 18/1260\r\n" );
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document.write( "18(1/12 + 1/20 + 1/30 + ... + 1/1260)\r\n" );
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document.write( "18(1/(3*4) + 1/(4*5) + 1/(5*6) + ... + 1/(35*36)\r\n" );
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document.write( "18*\"sum%281%2F%28i%28i%2B1%29%29%2C3%2C35%29\"\r\n" );
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document.write( "18*\"sum%28%281%2Fi-1%2F%28i%2B1%29%29%2C3%2C35%29\"\r\n" );
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document.write( "18*((1/3-1/4) + (1/4-1/5) + (1/5-1/6) + ... + (1/34-1/35) + (1/35-1/36))\r\n" );
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document.write( "18(1/3-1/36) = 6-1/2 = 5.5
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