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Question 18

Let $$f : (1, \infty) \to \mathbf{R}$$ be a function defined as $$f(x) = \frac{x-1}{x+1}$$. Let $$f^{i+1}(x) = f(f^i(x))$$, $$i = 1, 2, ..., 25$$, where $$f^1(x) = f(x)$$. If $$g(x) + f^{26}(x) = 0$$, $$x \in (1, \infty)$$, then the area of the region bounded by the curves $$y = g(x)$$, $$2y = 2x - 3$$, $$y = 0$$ and $$x = 4$$ is :

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