LimitsHard
Question
The set of all points where the function f(x) = 
is differentiable is:
is differentiable is:Options
A.(- ∞, ∞)
B.[0, ∞)
C.(-∞, 0) ∪ (0, ∞)
D.(0, ∞)
Solution
f(x) = 
f(x) is continous and differntiable for x ∈ R
f(x) =
f(x) is discontinous at |x| = 1 f(x)
f(x) is continous and differntiable for x ∈ R
f(x) =
f(x) is discontinous at |x| = 1 f(x)
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