Consider the function f(x) = 12x5 + 45x4 - 80x³ + 3. f(x) has inflection points at (reading from left to right) x = D, E, and F where D is and E is and Fis For each of the following intervals, tell whether f(x) is concave up or concave oo, D): Concave Down (D, E): Concave Up (E, F): Concave Down (F,00): Concave Up Question Help: Video

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