Match each piece of der -V bv e f'(x) is positive f'(x) is negative f"(x) is positive f"(x) is negative a. The graph of f(x) has an inflection point b. The graph of f(x) is increasing c. The graph of f(x) has a maximum or minimum d. The graph of f(x) is concave up e. The graph of f(x) is decreasing f. The graph of f(x) is concave down

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