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JEE Advance 2025 Paper 1

JEE Advance · 2025

94 questions · One at a time

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3
MCQ3 marks

Let R\mathbb{R}   denote the set of all real numbers. Define the function f ⁣:RRf \colon \mathbb{R} \to \mathbb{R}   by f(x)=22x2x2sin(1/x)f(x) = 2 - 2x^2 - x^2 \sin(1/x)   if x0x \neq 0   and f(0)=2f(0) = 2  . Then which one of the following statements is TRUE?

  • A.The function f is NOT differentiable at x = 0
  • B.There is a positive real number δ\delta  , such that f is a decreasing function on the interval (0, δ\delta  )
  • C.For any positive real number δ\delta  , the function f is NOT an increasing function on the interval (δ-\delta  , 0)Correct
  • D.x = 0 is a point of local minima of f
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