If x ,dy=y ,dx+y^2 ,dy, y>0 and y(1)=1, then what is y(-3) equal to?

NDA 2016 Mathematics question

If , and , then what is equal to?

Answer: (A)

y^2\dfrac{x dy-y dx}{y^2}\dfrac\dfrac$ xy =

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Question ID VK-028546