3. Let f: [0, 1] → R be a differntiable function. Suppose that f(0) = 0 and that f' (r) ≤1 for every x € (0,1). (a) Prov
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3. Let f: [0, 1] → R be a differntiable function. Suppose that f(0) = 0 and that f' (r) ≤1 for every x € (0,1). (a) Prov
3. Let f: [0, 1] → R be a differntiable function. Suppose that f(0) = 0 and that f' (r) ≤1 for every x € (0,1). (a) Prove that the series ƒ² (+) converges. Hint: use Lagrange's theorem. (b) Conclude that the series arctan² () converges. n=1
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