A function is differentiable at a point when it is both continuous at the point and doesn’t have a “cusp”. A cusp shows up if the slope of the function suddenly changes. An example of this can
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Check if Differentiable Over an Interval. f (x) = 4x − 2 f ( x) = 4 x - 2 , (1,3) ( 1, 3) Find the derivative. Tap for more steps 4 4. Find if the derivative is continuous on (1,3) ( 1, 3). Tap for more