What is 9.999 . . . equal to

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Proof that the sequence (1 + 1/n) power n converges to the number e

http://www.avidsynergy.com/pdf/number_e_binomial_theorem.pdf

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The proof of the Pythagorean theorem

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Estimation of mean and variance

http://www.avidsynergy.com/pdf/estimation.pdf

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Solving the integral ∫(ln(cos x))/(cos² x) dx

http://www.avidsynergy.com/pdf/IntegrationOf_Ln_Cos_x_div_Cos_x_squared.pdf

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