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A Real function (Posted on 2019-06-07) Difficulty: 4 of 5
Find all polynomials f(x)=xn+a1xnāˆ’1+a2xnāˆ’2+...+anāˆ’1x+an with the following properties:

(i) all the coefficients a1,..,an belong to the set {āˆ’1,1}
(ii) all the roots of the equation f(x)=0 are real

No Solution Yet Submitted by Danish Ahmed Khan    
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