Differentiable means that a function has a derivative at a given point, while continuously differentiable means that the derivative of the function exists and is continuous over a given interval. In other words, a function is continuously differentiable if its derivative is a continuous function. So, all continuously differentiable functions are differentiable, but not all differentiable functions are continuously differentiable. **

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No, 1z is not complex differentiable. In order for a function to be complex differentiable at a point, it must satisfy the Cauchy-Riemann equations, which require the function to be holomorphic. Since 1z is not holomorphic (as it does not satisfy the Cauchy-Riemann equations), it is not complex differentiable. **

Not necessarily. A function can be continuous without being differentiable. For example, the absolute value function is continuous everywhere but not differentiable at the point where the function changes direction. A function must satisfy certain conditions, such as having a well-defined tangent at each point, in order to be considered differentiable. **

No, not every antiderivative is continuously differentiable. While every antiderivative of a continuous function is continuous, it may not necessarily be continuously differentiable. For example, the antiderivative of the absolute value function, which is not continuously differentiable at the point where the function changes direction, is not continuously differentiable. Therefore, it is important to note that while antiderivatives are always continuous, they may not always be continuously differentiable. **

In mathematics, a function is said to be differentiable at a point if it has a derivative at that point. This means that the function has a well-defined tangent line at that point, indicating how the function changes locally around that point. A function is differentiable on an interval if it is differentiable at every point within that interval. The concept of differentiability is fundamental in calculus and is used to study the rate at which functions change. **

Broken rational functions are differentiable because they can be expressed as a quotient of two differentiable functions. The quotient rule for differentiation allows us to differentiate the numerator and denominator separately and then combine the results using the formula for the derivative of a quotient. As long as the denominator is not zero, the broken rational function will be differentiable. This is because the derivative of a quotient of differentiable functions is defined for all values of x where the denominator is not zero. **

Yes, both graphs are continuous as there are no breaks or jumps in the lines. However, the first graph is not differentiable at the point where the line changes direction abruptly, as there is a sharp corner. The second graph is differentiable everywhere as it has a smooth curve without any sharp corners or cusps. **