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Frequency of Vibration Energies

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Suppose the vibration energies are given as

Ev=w_e(v+1/2)-w_ex_e(v+1/2)^2

with w_e=3150cm^-1 and w_ex_e=113cm^-1. Calculate the frequency where the v=0-->v=4 overtone band occurs.

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https://brainmass.com/chemistry/general-chemistry/frequency-vibration-energies-181677

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For v=0 Ev = 1/2We-1/4XeWe
...

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The solution discusses the frequency of vibration energies where overtone band occurs.

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