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Black Book Advanced Problems in MathematicsMathematicsFunctions

Set of values of ' a ' for which the function f : R R , given by f(x) = x^3 + (a + 2)x^2 + 3ax + 10 is one-one is given by :

Options

  1. A(- , 1] [4, )
  2. B[1, 4]
  3. C[1, )
  4. D[- , 4]

Correct answer

B. [1, 4]

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