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The potential energy U varies with the position x of a particle according to relation U(x) = (x² − 6x) J (where x is in meter). Choose the correct option.
A
x = 3 is a point of unstable equilibrium.
B
x = −2 is a point of stable equilibrium.
C
x = 2 is a point of equilibrium.
D
x = 3 is a point of stable equilibrium.
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