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Nesting Radicals

Algebra Level 3

\[ \sqrt[3]{4 + 2\sqrt[3]{4 + 2\sqrt[3]{4 +2\sqrt[3]{4 +2\sqrt[3]{4 + \cdots }}}}} = \, ? \]

4 ∞ \[\frac{2}{3}\] -2 0 2

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by Isaac Reid

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