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Question: let fx x24x x lt 8 4x x gt...

Question details

Let fx= {x^2-4x x < 8 , 4x x > 8

Is f continuous at x=8?
Is f differentiable at x=8?
If f is differentiable at x=8 enter the value f'(8). If f is not differentiable at x=8 enter the value of f(8) instead.
f'(8) or f(8)=
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