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Determine f' from the defintion of the derivative

1) Determine the derivative function f' from the definition
Involving x+ x
2)Determine the differential of f

f(x)=1/(x+4), x

keywords: derivatives, differentials


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f' is determined from the defintion of the derivative. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.