a. Let f(x) = { 2 sin(2 – x) – 4, x< 2, - 2x, x > 2. Is f differentiable at r = 2? b. Let (2h(x) + x)² f(x) = x +2 where h : R -→ R is a differentiable function. Show that f is differentiable at r = 2. Find f'(2) given that h(2) = 1 and h'(2) = 1.

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