Determining whether a function is continuous or differentiable

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Question: answer and write out clear answer choice #9
The function f is not differentiable at x=5. Which of the following statements must be true .f is not continuous at x=5lim as f approaches 5 f(x) DNElim as f approaches 5 ((f(x)-f(5))/(x-5) DNElimit where 5 is upper, 0 is lower dx DNE

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