Find the sum of the first 12 terms of an arithmetic series if the first term is 13 and the common difference is 5.
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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.
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What is the value of f(x) when x = -3 in the reciprocal function f(x) = 1/x?