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JEE Main2011MathematicsTrigonometric EquationsActual

If A= ^2 x+ ^4 x , then for all real x

Options

  1. A13 16 A 1
  2. B1 A 2
  3. C3 4 A 13 16
  4. D3 4 A 1

Correct answer

D. 3 4 A 1

Step-by-step solution

A= ^2 x+ ^4 x= 7+ 4 x 8 3 4 A 1

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