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How to prove the following equality about Integral closure of an ideal in regular local ring of dimension 3?

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Regular Integral closure of an ideal in regular local ring of dimension 3

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Regular local ring of dimension 3

Let $(R,m)$ be a regular local ring of dimension three and $I$ be an ideal of $R$. Is $\bar{I^{n+1}}=I^n\bar{I}$ for all positive integer $n$? where $\bar{I}$ is integral closure of $I$.