2.II.13H

Analysis II | Part IB, 2007

Show that the limit of a uniformly convergent sequence of real valued continuous functions on [0,1][0,1] is continuous on [0,1][0,1].

Let fnf_{n} be a sequence of continuous functions on [0,1][0,1] which converge point-wise to a continuous function. Suppose also that the integrals 01fn(x)dx\int_{0}^{1} f_{n}(x) d x converge to 01f(x)dx\int_{0}^{1} f(x) d x. Must the functions fnf_{n} converge uniformly to f?f ? Prove or give a counterexample.

Let fnf_{n} be a sequence of continuous functions on [0,1][0,1] which converge point-wise to a function ff. Suppose that ff is integrable and that the integrals 01fn(x)dx\int_{0}^{1} f_{n}(x) d x converge to 01f(x)dx\int_{0}^{1} f(x) d x. Is the limit ff necessarily continuous? Prove or give a counterexample.

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