Question
If no arrows in a direction field point upwards, then the corresponding differential equation cannot have a stable equilibrium. True or false
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False.
The direction field only gives information about the behavior of the solutions near a given point, but it does not provide information about the existence or stability of equilibria.
For example, consider the differential equation y' = -y^3. The direction field shows that all arrows point downwards, indicating that solutions decrease as we move to the right. However, this equation has a stable equilibrium at y=0.
The direction field only gives information about the behavior of the solutions near a given point, but it does not provide information about the existence or stability of equilibria.
For example, consider the differential equation y' = -y^3. The direction field shows that all arrows point downwards, indicating that solutions decrease as we move to the right. However, this equation has a stable equilibrium at y=0.
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