What is the derivative of the function f(x) = 2x^3 - 5x?
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Math Question: In triangle ABC, if angle A is congruent to angle B and side AB is congruent to side AC, then what can be concluded about triangle ABC? (
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Question: Given the quadratic function f(x) = -2x^2 + 4x - 1, find the vertex coordinates and axis of symmetry.