The question is asking to find the derivative of the function: y=4-7e^-x^9 I am confused because there are so many exponents. It would really help to see the work with the answer.
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You have to be clearer. Is it: ? ... If yes, use the chain rule. The derivative of Let
Last edited by Siron; Jul 13th 2011 at 07:52 AM.
Originally Posted by StarDancer19 The question is asking to find the derivative of the function: y=4-7e^-x^9 I am confused because there are so many exponents. It would really help to see the work with the answer. It would really help if you put in parentheses so we knew if you meant or or something else. CB
Sorry about the clearness. It is: 4- [7e^(-x^9)] I understand how to use the chain rule to find that u=-x^9 What I need help on is actually seeing the work of the rest
Sorry about that, but the question I am asking is the first suggestion you had.
In your example you have ====================================== Alternatively: You have ====================================== Both notations depict the chain rule so pick whichever is easier to understand
Originally Posted by StarDancer19 Sorry about the clearness. It is: 4- [7e^(-x^9)] I understand how to use the chain rule to find that u=-x^9 That I need help on is actually seeing the work of the rest What that tells me is that you have no idea how to use the chain rule! You don't use the chain rule to "find that u= -x^9". If then becomes . Can you find df/du? And what is du/dx? The chain rule says .
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