document.write( "Question 1178670: Write the given series in summation notation.\r
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Algebra.Com's Answer #808027 by math_helper(2461)\"\" \"About 
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\"+sum%28%28-1%29%5E%28n-1%29%2A3%5En%2C+n=1%2C+n=7%29+\" \n" ); document.write( "
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