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JEE Main 2017

JEE Main 2017 Mathematics question on Circles

The radius of a circle having minimum area, which touches the curve y=4−x2y = 4 - x^2 and the lines y=∣x∣y = |x|, is
  1. A.
    2(2+1)2(\sqrt{2} + 1)
  2. B.
    2(2−1)2(\sqrt{2} - 1)
  3. C.
    4(2−1)4(\sqrt{2} - 1)
  4. D.
    4(2+1)4(\sqrt{2} + 1)
Show answer

Correct option: C

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