The gure shows the potential energy ['05) as a function of molecular separation x for a diatomic molecule of reduced mass ,u. If V(x) = K)(1e_(x_x\"y 5)2 Vo, the vibrational frequency f at the equilibrium position is _. 2 x (Hint: This series expansion may be useful. e'r :5 l+x+) 2! 2V0 V(x) #62 x\