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A certain mass m = 8.00 kg is able to move in only one direction, which we call the
x-axis. It has a potential energy given by this function:
V(x) = Ax² - Bx³
where x is in meters, A = 9.0 kg/s², and B = 0.500 kg/(ms2). This potential energy
function is valid for all values of x, positive and negative.
O Locate all equilibrium positions, and note whether they are stable or unstable.

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