If x 2 + y 2 = 1, then

Mathematics · JEE Advanced · NTA ExamsDifferential Equations

If x2 + y2 = 1, then
  1. yy′′– 2 (y)2 + 1 = 0
  2. yy′′ + (y)2 + 1 = 0
  3. yy′′ + (y)2 – 1 = 0
  4. yy′′ + 2(y)2 + 1 = 0

Answer

(B) yy ′′ + ( y ′ ) 2 + 1 = 0

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