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Question

The integrating factor of the differential equation (x+3y2)dydx=y is 
  1. 1x
  2. 1y
  3. 1x2
  4. 1y2


Solution

The correct option is B 1y
(x+3y2)dydx=ydxdy=xy+3ydxdyxy=3y
Integrating factor 
=e1y dy=elny=1y

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