11. [0/1 Points] DETAILS PREVIOUS ANSWERS SCALCCC5 2.7.045. Need Help? Read It MY NOTES ASK YOUR TEACHER Submit Answer The graph of f is given. State the numbers at which f is not differentiable. (Enter your answers as a ( 15. [-/1 Points] DETAILS SCALCCC5 2.7.057. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Use the definition of derivative to find f'(x) and f"(x). N f(x) = 5x2 + 9x+ 2 f' ( x ) = f " ( x ) = X : X Need Help? Read It Enhanced Feedback Please try again. Remember, functions are not differentiable at corners, discontinuities, or vertical ta Submit Answer Need Help? Read It 16. [1/1 Points] DETAILS Submit Answer PREVIOUS ANSWERS SCALCCC5 2.7.AE.001. MY NOTES ASK YOUR TEACHER