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In each part, sketch the graph of a function f with the stated properties, and discuss the signs of f^' and f^''. (a) The function f is concave up and increasing on the interval (-∞,+∞). (b) The function f is concave down and increasing on the interval (-∞,+∞). (c) The function f is concave up and decreasing on the interval (-∞,+∞). (d) The function f is concave down and decreasing on the interval (-∞,+∞). | Numerade

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