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Black Book Advanced Problems in MathematicsMathematicsApplication of Derivatives

The number of integral values of a for which f(x) = x^3 + (a + 2)x^2 + 3ax + 5 is monotonic in x R .

Options

  1. A2
  2. B4
  3. C6
  4. D7

Correct answer

B. 4

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