Question: Consider the following. (If an answer does not exist, enter DNE.) f ( x ) = 2 x 3 9 x 2 +6 x 4

Consider the following. (If an answer does not exist, enter DNE.)

f(x) = 2x39x2+6x4

a)Find the interval(s) on whichfis concave up. (Enter your answer using interval notation.)

b)Find the interval(s) on whichfis concave down. (Enter your answer using interval notation.)

c)Find the inflection point off

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