Is the function f : R ➡R, defined by f(x) = 1-|x| is differentiable at x=1
Then
Therefore the function f(x)=1−∣x∣f(x) = 1-|x|f(x)=1−∣x∣ is differentiable at x=1x=1x=1 and f′(1)=−1.f'(1)=-1.f′(1)=−1.
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