Show that a nonzero polynomial function y = (x) cannot satisfy the equation y'= y. Use this

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Show that a nonzero polynomial function y = ƒ(x) cannot satisfy the equation y'= −y. Use this to prove that neither ƒ(x) = sin x nor ƒ(x) = cos x is a polynomial. Can you think of another way to reach this conclusion by considering limits as x→∞?

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Calculus

ISBN: 9781319055844

4th Edition

Authors: Jon Rogawski, Colin Adams, Robert Franzosa

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