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# Family $y=Ax+A^3$ of curves is represented by the differential equation of degree$(A)\;1\quad(B)\;2\quad(C)\;3\quad(D)\;4$

Toolbox:
• The degree of a linear differential equation is determined by the power raised by the highest order derivative.
$y=Ax+A^3$
This equation is a linear differential equation.
Here the highest order derivative is y.
The degree of this derivative is 1
So the degree is also 1
Hence the correct option is $A$