What is the integral of ∫ (e^x)/(1+e^x)^2 dx using the inverse tangent substitution?
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Question: If two triangles have equal corresponding angles, and the lengths of one pair of corresponding sides are equal, then what can be concluded about these triangles?
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What is the limit of f(x) as x approaches 3, where f(x) = (2x + 1) / (x - 3)?