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Let f(x)=x4+ax3+bx2+cx+d be a polynomial with real co efficient and real roots. Also |f(x)| = 1,then the value of a + b + c+ d is___

Answer» Let f(x)=x4+ax3+bx2+cx+d be a polynomial with real co efficient and real roots. Also |f(x)| = 1,then the value of a + b + c+ d is___


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