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Problem 55 Hard Difficulty

Evaluate the indefinite integral as an infinite series.

$ \int \frac {\cos x - 1}{x} dx $


$c+\sum_{n=1}^{\infty} \frac{(-1)^{n}}{2 n \cdot(2 n) !} x^{2 n}$ where $c$ is a constant.


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Video Transcript

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