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Let h be a continuous function for x > 0, with its first derivative given by h(x) = - 2x+6x2+ -. The graph of h

Let h be a continuous function for x > 0, with its first derivative given by h(x) = - 2x+6x2+ -. The graph of h is concave up on which of the following intervals? O (0.5, co) O (0.459, 0o) O (-00, -0.459) O (0, 0.5)

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