If f(x)= 2= (absolute value x-3) for all x, then the value of the derivative f'(x) at x=3 is?

If f(x) = 2 |x - 3|, then f '(x) is 2 for x > 3 and f '(x) is -2 for x < 3. The derivative f ' (3) does not exist.

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