Potential energy of a particle moving along \( x \)-axis given by \( U=\frac{x^{3}}{3}-\frac{9 x....

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Potential energy of a particle moving along \( x \)-axis
\( \mathrm{P} \)
given by \( U=\frac{x^{3}}{3}-\frac{9 x^{2}}{2}+20 x \). Find out position of
W
the stable equilibri \( { }_{\text {At }} \mathrm{m} \) state.
(1) \( x=5 \)
(2) \( x=4 \)
(3) \( x=3 \)
(4) \( x=1 \)


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