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HW$26$

Problem $2$

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HW$26$: Problem $2$

$(1$ point$)$

Determine the intervals on which the function $f(x)=-6x^2-1x-8$ is concave up or down and find the points of inflection.

$($Use symbolic notation and fractions where needed. Give your answer as comma separated list. Enter NULL if there are no points of inflection.$)$

Points of inflection: help $($fractions$)$

$($Use symbolic notation and fractions where needed. Give your answers as intervals in the form ${(}^{***},{?}^{**}).$ Use inf for infinity $,$ U for combining intervals, and appropriate type of parenthesis $"(",")","["$ or $"]"$ depending on whether the interval is open or closed. Enter NULL if interval is empty.$)$

$f(x)$ is concave up when xin help $($intervals$)$

$f(x)$ is concave down when xin help $($intervals$)$

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