document.write( "Question 621647: find sum of series a - (a d) (a 2d) - (a 3d) ----- (2n 1) terms \n" ); document.write( "
Algebra.Com's Answer #390875 by lynnlo(4176)\"\" \"About 
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a-a^3d^2-2a^3dn \n" ); document.write( "
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