Find the limit as x approaches 3 of (x^2 + 4) / (x - 3).
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What are the characteristics of the cubic function f(x) = x^3? Find the x-intercept, y-intercept, vertex, domain, range, and if it is increasing or decreasing.
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What are the characteristics of the quadratic function f(x) = x^2? How does the graph of this quadratic function look like? What are the axis of symmetry, vertex coordinates, and y-intercept? How would the graph be affected if the coefficient of x^2 were negative instead of positive?