Suppose (-8, 6) is a critical point of a function f with continuous second derivatives. If fra (-8, 6) = 9, fry (-8, 6) = 9 and fyy (-8, 6) = -1, use the Second Derivatives Test to classify the point (-8, 6).

Q: If ƒ(x) = x^n, n>=1, show from the definition of the derivative that ƒ′(0) = 0.

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