Find the x-coordinate(s) where the rational function f(x) = 1/x intersects the x-axis.
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Find the limit as x approaches 0 of (sin(5x) / (5x))
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Math question: "For a function f(x) that is continuous on the closed interval [a, b], where a=-3 and b=5, evaluate the extreme value(s) of f(x) on this interval."