In Problems 61-68, f(x) is continuous on (-, ). Use the given information to sketch the

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In Problems 61-68, f(x) is continuous on (-∞, ∞ ). Use the given information to sketch the graph of f.

f'(x) + + + 0 + + + 0- - - x T -2 -1 -1 1 0 2 1 3 2 20 1

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