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JEE Main2006MathematicsApplication of DerivativesActual

The function f(x)= x 2 + 2 x has a local minimum at

Options

  1. Ax = 2
  2. Bx = −2
  3. Cx = 0
  4. Dx = 1

Correct answer

A. x = 2

Step-by-step solution

x 2 + 2 x is of the form x+ 1 x 2 & equality holds for x=1

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