# Limit of a composite function!

**Calculus**Level 4

\[ \large \lim_{x\to0} \left[\lim_{n\to\infty} 2^{2n} \left(1 - f^n(x) \right)\right] \]

For \(f: [0,1] \rightarrow \mathbb R \) and \( f(x) = \sqrt{\frac{1+x}2} \), find the limit above.

Clarification: \(f^n(x) = \underbrace{f \circ f \circ f \circ \ldots \circ f}_{n \text{ times}} (x) \).