20. Use the following information to sketch the graph of the continuous func- tion y = f(x) whose domain is (-», ∞0). f(-1) = 2, f(0) = 0, ƒ(1) = –2, f'(-1) = 0, f'(1) = 0, ƒ'(0) = 0, fr(x) > 0 on (-∞, –1) and (1, 0), and fi(x) < 0 on (-1,0) and (0,1). %3|

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A: follow next step

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Q: 1. Show that a frination fiłamb ]->1R is differentiable at xolamb) is and only if its lower and…

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A: We have to check for the end points.

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