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2017-02-20 19:58:54 +0100 | commented answer | help on using chain rule in Sage Great! I see that |

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2017-02-20 09:50:09 +0100 | asked a question | help on using chain rule in Sage Does anyone have any tips for using Sage to take derivatives of functions of many variables? For example, if I define
and then if I suppose that
But this isn't really using the chain rule. If I instead try
Apparently it thinks the derivative is zero because it still thinks
and similarly for |

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