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user 190778
Applies to questions of primarily educational value - not only questions that arise from actual homework assignments, but any question where it is preferable to guide the asker to the answer rather than giving it away outright. Please READ THE GUIDANCE IN META before asking homework-like questions.
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Integration over phase space for a one-dimensional harmonic oscillator
Use:
$\delta(f(x))=\sum_{i} \frac{1}{\mid\frac{df}{dx}(x_i)\mid} \delta(x-x_i)$
where $x_i$ is the i_th zero of f(x)
i think you will find the result after doing this
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