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Improper Integral

Calculus Level 3

Evaluate the improper integral

$\int_0^\infty \frac{1}{e^x + e^{-x}} \, dx.$

\frac{\pi}{4}

\frac{\pi}{e}

\frac{\pi}{2}

\frac{5}{2e}

\frac{e}{2}

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by Henry Maltby

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