Question: Consider the function f(x) = 12x5 + 30x4 300x3 + 7. has inflection points at (reading from left to right) x - D, E,

Consider the function f(x) = 12x5 + 30x4 300x3 + 7. 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 is concave up or concave down.
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