Question: 2. Let f be a function defined on all reals: (a) Show that if f is everywhere differentiable and f'(x) = 0 for all x,

2. Let f be a function defined on all reals: (a) Show that if f is everywhere differentiable and f'(x) = 0 for all x, then f is constant. (b) Show that if If(x) - f(y)|

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