document.write( "Question 607313: If p + q + r =1 , pq + qr + rs = -1 and pqr = -1, find the value of p^ 3 + q^ 3 + r ^3 \n" ); document.write( "
Algebra.Com's Answer #382579 by lynnlo(4176)\"\" \"About 
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answer: 1 \n" ); document.write( "
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