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COMEDK2025MathematicsIndefinite IntegrationActual

If x=2 a ⁻¹ ( y 2 a )- 2 a y-y^2 then d y d x =

Options

  1. Ay 2 a-y
  2. B2 a-y y
  3. C1 2 ( 2 a-y y )
  4. D2 a-y y

Correct answer

D. 2 a-y y

Step-by-step solution

Given x = 2a ⁻¹ ( y 2a ) - 2ay - y^2 . Let y = 2a ^2 . Then y 2a = , so = ⁻¹ ( y 2a ) . Also, 2ay - y^2 = 2a(2a ^2 ) - (2a ^2 )^2 = 4a^2 ^2 (1 - ^2 ) = 4a^2 ^2 ^2 = 2a = a (2 ) . Substituting these into the expression for x : x = 2a - a (2 ) . Differentiating x with respect to : dx d = 2a - 2a (2 ) = 2a(1 - (2 )) = 2a(2 ^2 ) = 4a ^2 . Differentiating y = 2a ^2 with respect to : dy d = 2a(2 ) = 4a . Using the chain rule dy dx = dy/d dx/d : dy dx = 4a 4a ^2 = = . Since ^2 = y 2a , we have ^2 = 1 - y 2a = 2a - y 2a .

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