Math question: What are the signs of equality of triangles according to which pairs of corresponding elements have equal measures in the triangle congruence postulates?
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What is the unit vector in the direction of vector u = 3i + 4j - 2k?
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What are the characteristics of the cubic function f(x) = x^3? Identify its axis of symmetry, vertex, and whether it is an increasing or decreasing function. Additionally, determine if it has any intercepts and inflection points.