The force F acting on a body moving along x-axis varies with the position x of the particle as shown in the graph. The body is in stable equilibrium at

If d2Udx2>0, then it is the position of stable equillibriumIf d2Udx2<0, then it is the position of unstable equillibriumAt x1, dFdx>0⇒ddx−dUdx>0, i.e., d2Udx2<0x1 is the position of unstable equillibriumAt x2, dFdx<0⇒ddx−dUdx<0, i.e., d2Udx2>0x2 is the position of stable equillibrium