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If a, b and c are three distinct real numbers, and((x - b) (x - c))/( (a - b) (a - c)) + ((x - c)(x - a))/((b - c) (b - a)) + ((x - a) (x - b))/((c - a)(c - b))=Ax^(2) + Bx + C then (A - 2 B + 4 C)/( 2 A - B + C) is equal to _______ |
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