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$\begingroup$

Spivak's proof of the chain rule in $\mathbb{R^n}$. The proof can be found on page 19.

I'm confused by the last step. "Equation 6 now follows easily."

Page 19

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    Could you kindly add the proof or give a link where the proof can be found?2012-05-25
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    Spivak has more than one book...2012-05-25
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    Sorry, I just added the link.2012-05-25

2 Answers 2