Continuity and DifferentiabilityHard
Question
If f (x) = | x + 1 | ( | x | + | x - 1 | ) then at what points the function is/are not differentiable at in the interval [-2, 2]
Options
A.-1
B.0
C.1
D.1/2
Solution
f(x) = 
f′(x) =
Function is not differentiable at x = -1, 0 and 1.
f′(x) =
Function is not differentiable at x = -1, 0 and 1.
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