How to find this limit :
$$\lim_{n \to \infty} \frac{2-\sqrt{2+\sqrt{2 +\sqrt{2+ \cdots n \text{ times}}}}}{4^{-n}}$$
Please help not getting any idea how to solve this , will be of great help thanks.
How to find this limit :
$$\lim_{n \to \infty} \frac{2-\sqrt{2+\sqrt{2 +\sqrt{2+ \cdots n \text{ times}}}}}{4^{-n}}$$
Please help not getting any idea how to solve this , will be of great help thanks.
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