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Solution


Q.

Which of the following is a second order differential equation
1 (y')2+x=y2  
2 y'y''+y=sinx  
3 y'''+(y')2+y=0  
4 y'=y2  

Ans.

(2)

Ans.     y'y''+y=sinx

Explanation:

The second order differential equation is  y'y''+y=sinx.