Find the derivative of this function:
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You'll still need to use the chain rule on that -u of course
The function is: Fernando Revilla
You can also use the chain rule together with the fact that the derivative of is .
Notice that |x| does NOT have a derivative at x= 0. The given function also does not exist at x= 1 and x= -1 and so does not have a derivative at x=-1, x= 0, and x= 1.
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