WAMAP HW #$9$: Section $4\mathrm{.}5$ & $4\mathrm{.}7($Due Sunday$)$

Score: $3\mathrm{.}04/14$ Answered: $2/14$

Question $4$

Score on last try: $0\mathrm{.}14$ of $1$ pts$.$ See Details for more.

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Consider the function $f(x)=12x^5+60x^4-240x^3+1.$

$f(x)$ has inflection points at $($reading from left to right$)x=D,E,$ and $F$

where $D$ is

and $E$ is

$$

$$

and $F$ is $$

For each of the following intervals, tell whether $f(x)$ is concave up or concave down.

$(-,D)$: Select $an$ answe

$(D,E)$: Select $an$ answer

$(E,F)$: Select $an$ answer $s$

$(F,)$: Select $an$ answer

Select an answer

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