Mathematics

Mathematics

Problem

In Exercises 47-54, find (a) lim⁡x→∞y\lim _{x \rightarrow \infty} y and (b) lim⁡x→−∞y\lim _{x \rightarrow-\infty} y. 54. y=e−xcos⁡xy=e^{-x} \cos x

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