CAT Quant Practice Problems

Question: \(x = \sqrt {4 + \sqrt {4 - \sqrt {4 + \sqrt {4 - ...{\rm{ \infty }}{\rm{.}}} } } } \) The equals

3
\(\left( {\frac{{\sqrt {13} - 1}}{2}} \right)\)
\(\left( {\frac{{\sqrt {13} + 1}}{2}} \right)\)
\(\sqrt {13} \)
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