A particle is acted upon by a force given by \( F=-\alpha x^{3}-\beta x^{4} \) where \( \alpha \...

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A particle is acted upon by a force given by \( F=-\alpha x^{3}-\beta x^{4} \) where \( \alpha \) and \( \beta \) are positive constants. At the point \( x=0 \), the particle is
[KVPY 2012]
(a) In stable equilibrium
(b) In unstable equilibrium
(c) In neutral equilibrium
(d) Not in equilibrium
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