Answer:
In mathematics, the derivative of a function of a real variable measures the sensitivity to change of the function value with respect to a change in its argument. Derivatives are a fundamental tool of calculus.
Explanation:
So in general, a derivative is given by y′=limΔx→0ΔyΔx. To recall the form of the limit, we sometimes say instead that dydx=limΔx→0ΔyΔx.
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