Category Archives: TA Notes

Counterexamples in differentiation

Exercise. Prove or disprove. If it is not true, find a counterexample. and , then . If is differentiable at , or are differentaible at . If and are infinitely differentiable on and on , then or . If is differentiable at and is differentiable at , then is differentiable at . If is differentiable… Read More »