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The potential energy of a particle $\left(U_x\right)$ executing $S.H.M$. is given by
  • A$U_x=\frac{k}{2}(x-a)^2$
  • B$U_x=k_1 x+k_2 x^2+k_3 x^3$
  • C$U_x=A e^{-b x}$
  • D$U_x=a\,constant$
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