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title: Product Rule Intro
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## Product Rule Intro

This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/mathematics/product-rule-intro/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>.

<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>.

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