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| A Real function (Posted on 2019-06-07) |
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Find all polynomials f(x)=xn+a1xnā1+a2xnā2+...+anā1x+an with the following properties:
(i) all the coefficients a1,..,an belong to the set {ā1,1}
(ii) all the roots of the equation f(x)=0 are real
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