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Nonlinear Differential Equations
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Which of the following is a nonlinear differential equation?
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A
$y'' + y^2 = 0$
💡 Explanation:
A nonlinear differential equation is an equation that is not linear in the unknown function and its derivatives. In this case, the equation $y'' + y^2 = 0$ is nonlinear because the term $y^2$ is not linear in $y$.