polynomials

[Varnana Premanand]

<p>a,b,c∈R. If the equation x4+ax3+bx2+cx+1=0 has no real root and if at least one root is of modulus one, then</p><p>Select one:</p><p>A. b=c</p><p>B. a=c</p><p>C. a≠c</p><p>D. None of these</p>

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