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Friday, 9 October

JEE Main 2017 · MathsMultiple choiceSingle correctHardMulti-step

JEE Main 2 April 2017 (offline), Maths Q79

Question 79 of 90 in this shift, Maths question 19 of 30. NTA dropped this question from the final key; it is left out of every count on this site.

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. (1)2(2−1)2(\sqrt{2}-1)
  2. (2)4(2−1)4(\sqrt{2}-1)
  3. (3)4(2+1)4(\sqrt{2}+1)
  4. (4)2(2+1)2(\sqrt{2}+1)

Official answer

Dropped by NTA (marks given to all)

CBSE answer key (25/04/2017, used for result): bonus (CBSE key 9: 4 marks to all).

Chapter
Conic Sections
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA (CBSE ran the 2017 exam); answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.