5. [0/0.4 Points] DETAILS PREVIOUS ANSWERS Determine where the function is concave upward and where it is concave downward. (Enter your answer using interval notation. If an answer does not exist, enter DNE.) f(x) = 10 Vx Concave upward: |dne Concave downward: X Submit Answer 6. [-/0.4 Points] DETAILS Determine where the function is concave upward and where it is concave downward. (Enter your answer using interval notation. If an answer does not exist, enter DNE.) f ( x ) = (x - 7)2/3 Concave upward: Concave downward: 7. [-/0.36 Points] DETAILS This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise Find the inflection point(s), if any, of the function. (If an answer does not exist, enter DNE.) g(x) = 8x3 - 12x2 + 4x - 2 Click here to begin! 8. [-/0.4 Points] DETAILS Find the inflection point(s), if any, of the function. (Order your answers from smallest to largest x. If an answer does not exist, enter DNE.) (x) = 2x4 - 4x3 + 7 ( x, y ) = ( x , V ) =