\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Let \(f(x) = x^3\). Compute the tangent line to the graph of \(f\) at \(a = 1\), then determine on which subset of \(\mathbb{R}\) the graph of \(f\) lies above the tangent.
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