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3. Given f(x)=2x-12x+18x a) Use the second derivative sign chart to determine the intervals on which f(x) is concave up and concave down. b)

3. Given f(x)=2x-12x+18x a) Use the second derivative sign chart to determine the intervals on which f(x) is concave up and concave down. b) Give the coordinates of any inflection points.

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