Question: Could you explain how to approach this problem? Thank you. Exercise 6.2.21: Let fn(x) := X Itinx)2. Notice that fn are differentiable functions. a) Show

Could you explain how to approach this problem? Thank you.

Exercise 6.2.21: Let fn(x) := X Itinx)2. Notice that fn are differentiable functions. a) Show that { fn} converges uniformly to O. b) Show that Ifh. (x) | >gn(x) # 0 for every rational number x

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