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Black Book Advanced Problems in MathematicsMathematicsFunctions

Let f(x) = x^2 - bx + c, b is an odd positive integer. Given that f(x) = 0 has two prime numbers as roots and b+c = 35 . If the least value of f(x) x R is , then [ | 3 | ] is equal to (where [ ] denotes greatest integer function)

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6

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