(a) Show for all x Є R, the sum Σx=-17/2 COS (2) converges uniformly. (b) Show for all x = R, the sum Σx=-173 sin (22) converges uniformly. (c) Find a relationship between 2 c f: RR defined by COS n³ (2) and sin (2) and use this to show is differentiable. f(x) = Στ n=1 X COS

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