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BITSAT2015MathematicsApplication 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

D. x=1

Step-by-step solution

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

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