Aşağıdaki kümelerin sup ve inf değerlerini bulunuz

Question

$$A=\{1+\left(-1\right)^n : n\in\mathbb{N}\}$$

$$B=\left\{x \in \mathbb{R}  \backslash \left\{5\right\} : \dfrac{2x-1}{x-5} \geq\ 5\right\}$$

$$C=\left\{1-\dfrac{1}{n}+\dfrac{1} {2^{m}} : m,n\in\mathbb{N}\right\}$$