Problem 67. Assume f is a graph, and x₁,x2, x3, ... is a sequence of points in the domain of f converging to to the point c in the domain of f, and for each positive integer n f(xn) ≥n. Show that f is not continuous at c.

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A: The given differential equation is 9dydn=2n(1-7n). ⇒9dydn=2n-14n2.

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