SOLUTION: The function 𝑓 is defined in [−8, 8] and its graph is shown. Which of the following is a complete list of all the values of 𝑥 in the interval (−8, 8) for which the functi

Question 1148795: The function 𝑓 is defined in [−8, 8] and its graph is shown. Which of the following is a complete list of all the values of 𝑥 in the interval (−8, 8) for which the function is not differentiable?
Link to graph:
https://drive.google.com/file/d/1apCU08Nel1vu_fEW5VZ8rGFn5vg_sXu7/view?usp=drivesdk
A) −4, 1
B) 1
C) −4, 1, 6
D) −4, 6
E) −4, 1, 4.3, 6
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.

It is not differentiable at the points where you see discontinues or corners.

I see such points at x= -4, 1 and 6.

The answer is option C.

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