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The integrating factor of the differential equation  is, (y≠ 0)

  2. y2
  3. y

Answer (Detailed Solution Below)

Option 1 :
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Detailed Solution

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Concept: 

Integrating factor, (IF) for a differential equation, , where P and  Q are given continuous function of y. 

IF =  

Calculation:

The given equation  can be simplified as, 

   

On comparing eqn ( i ) with standard eqn ,  , we get ,

P =  and Q = 

 ∴ IF =  =  

⇒ IF =  =   

⇒ IF =  .  ( ∵  ) 

The correct option is 1 . 

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