Q13

13. [-l8 Points] DETAILS TANAPCALC1O 4.2.030.EP. MY NOTES ASK YOUR TEACHER | PRACTICE ANOTHER Consider the following function. g(x) = X2 + 9X + 1 Find the first and second derivatives of the function. 9 '(X) = g \"(X) = 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.) concave upward concave downward