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True or False? In Exercises 121-124. determine whether the statement is true or false. If it is false, explain why or give an example that shows it is false.
If y is a differentiable function of u, and u is a differentiable function of x. then y is a differentiable function of x.
If y is a differentiable function of u, u is a differentiable function of v, and v is a differentiable function of x, then
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Is the function below differentiable at ? If not, why is it not differentiable?