Consider the funciton: , This function is not differentiable where does not exist. This would be at . By this reasoning, is a critical number correct?
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Originally Posted by adkinsjr Consider the funciton: , This function is not differentiable where does not exist. This would be at . By this reasoning, is a critical number correct? Look up the definition you have been given for critical point. If it a point x=c where f is defined and either f'(c)=0 or f'(c) is undefined, then yes. CB
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