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Horner rule

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Given a polynomial of the form c n x n  + c n-1 x n-1  + c n-2 x n-2  + … + c 1 x + c 0   and a value of x, find the value of polynomial for a given value of x. Here  c n , c n-1 , ..  are integers (may be negative) and n is a positive integer.
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