document.write( "Question 884027: What is the sum of the arithmetic series \"sum%28%281%2B5i%29%2Ci=1%2C13%29\"?
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Algebra.Com's Answer #535700 by Edwin McCravy(20059)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "We use the facts that \"sum%28%281%29%2Ci=1%2Cmatrix%281%2C2%2C%22%22%2Cn%29%29=n\" and \"sum%28%28i%29%2Ci=1%2Cmatrix%281%2C2%2C%22%22%2Cn%29%29=n%28n%2B1%29%2F2\"\r\n" );
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document.write( "\"sum%28%281%2B5i%29%2Ci=1%2C13%29\"\"%22%22=%22%22\"\"sum%28%281%29%2Ci=1%2C13%29%2Bsum%28%285i%29%2Ci=1%2C13%29\"\"%22%22=%22%22\"\"sum%28%281%29%2Ci=1%2C13%29%2B5sum%28%28i%29%2Ci=1%2C13%29\"\"%22%22=%22%22\"\"13%2B5%2Aexpr%2813%2813%2B1%29%2F2%29\"\"%22%22=%22%22\"\"468\"\r\n" );
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document.write( "Edwin
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