Is (1+y^2) d^2y/dt^2 + t dy/dt + y = et a Linear Equation?

patrickbotros
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(1+y2) d2y/(dt2) + t dy/dt +y = et
 
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I think its not linear, there's y squared
 
No, it's not.
 
It is not because, as Leonita said, it has a non-linear function of the dependent variable, y.
 

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