Which rule for congruence of triangles states that if two sides of one triangle are equal to two sides of another triangle, and the included angle is also equal, then the triangles are congruent?
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What is the value of x when f(x) = log x / f(x) = ln x, given that x > 0 and f(x) is the logarithmic function?
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How many local maximum and minimum points can a continuous function have on a closed interval?